From c644ede43027d4b9437bf084923d99aa4c4905e6 Mon Sep 17 00:00:00 2001
From: Rick Waldron <waldron.rick@gmail.com>
Date: Fri, 2 Oct 2020 09:35:56 -0400
Subject: [PATCH] Built-in function objects that are not identified as
 constructors must throw a TypeError exception when new'ed. Fixes gh-1739

---
 .../prototype/getYear/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/setYear/not-a-constructor.js    | 27 +++++++++++++++++++
 .../toGMTString/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/anchor/not-a-constructor.js     | 27 +++++++++++++++++++
 .../String/prototype/big/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/blink/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/bold/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/fixed/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/fontcolor/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/fontsize/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/italics/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/link/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/small/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/strike/not-a-constructor.js     | 27 +++++++++++++++++++
 .../String/prototype/sub/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/substr/not-a-constructor.js     | 27 +++++++++++++++++++
 .../String/prototype/sup/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/escape/not-a-constructor.js     | 23 ++++++++++++++++
 .../built-ins/unescape/not-a-constructor.js   | 23 ++++++++++++++++
 .../built-ins/Array/from/not-a-constructor.js | 23 ++++++++++++++++
 .../Array/isArray/not-a-constructor.js        | 23 ++++++++++++++++
 test/built-ins/Array/of/not-a-constructor.js  | 24 ++++++++++++-----
 .../Symbol.iterator/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/concat/not-a-constructor.js     | 25 ++++++++++-------
 .../prototype/copyWithin/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/entries/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/every/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Array/prototype/fill/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/filter/not-a-constructor.js     | 27 +++++++++++++++++++
 .../Array/prototype/find/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/findIndex/not-a-constructor.js  | 27 +++++++++++++++++++
 .../Array/prototype/flat/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/flatMap/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/forEach/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/includes/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/indexOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Array/prototype/join/not-a-constructor.js | 23 ++++++++++++++++
 .../Array/prototype/keys/not-a-constructor.js | 23 ++++++++++++++++
 .../lastIndexOf/not-a-constructor.js          | 27 +++++++++++++++++++
 .../Array/prototype/map/not-a-constructor.js  | 23 ++++++++++++++++
 .../Array/prototype/pop/not-a-constructor.js  | 23 ++++++++++++++++
 .../Array/prototype/push/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/reduce/not-a-constructor.js     | 27 +++++++++++++++++++
 .../reduceRight/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/reverse/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/shift/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/slice/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Array/prototype/some/not-a-constructor.js | 23 ++++++++++++++++
 .../Array/prototype/sort/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/splice/not-a-constructor.js     | 27 +++++++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/unshift/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/values/not-a-constructor.js     | 27 +++++++++++++++++++
 .../ArrayBuffer/isView/not-a-constructor.js   | 23 ++++++++++++++++
 .../prototype/slice/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Atomics/add/not-a-constructor.js          | 23 ++++++++++++++++
 .../Atomics/and/not-a-constructor.js          | 23 ++++++++++++++++
 .../compareExchange/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Atomics/exchange/not-a-constructor.js     | 23 ++++++++++++++++
 .../Atomics/isLockFree/not-a-constructor.js   | 23 ++++++++++++++++
 .../Atomics/load/not-a-constructor.js         | 23 ++++++++++++++++
 .../Atomics/notify/not-a-constructor.js       | 23 ++++++++++++++++
 .../built-ins/Atomics/or/not-a-constructor.js | 23 ++++++++++++++++
 .../Atomics/store/not-a-constructor.js        | 23 ++++++++++++++++
 .../Atomics/sub/not-a-constructor.js          | 23 ++++++++++++++++
 .../Atomics/xor/not-a-constructor.js          | 23 ++++++++++++++++
 .../BigInt/asIntN/not-a-constructor.js        | 20 ++++++++++++++
 .../BigInt/asUintN/not-a-constructor.js       | 20 ++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 25 +++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 25 +++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 25 +++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../getBigInt64/not-a-constructor.js          | 27 +++++++++++++++++++
 .../getBigUint64/not-a-constructor.js         | 27 +++++++++++++++++++
 .../prototype/getFloat32/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/getFloat64/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/getInt16/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/getInt32/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/getInt8/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/getUint16/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/getUint32/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/getUint8/not-a-constructor.js   | 27 +++++++++++++++++++
 .../setBigInt64/not-a-constructor.js          | 27 +++++++++++++++++++
 .../setBigUint64/not-a-constructor.js         | 27 +++++++++++++++++++
 .../prototype/setFloat32/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/setFloat64/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/setInt16/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/setInt32/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/setInt8/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/setUint16/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/setUint32/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/setUint8/not-a-constructor.js   | 27 +++++++++++++++++++
 test/built-ins/Date/UTC/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Date/now/not-a-constructor.js  | 23 ++++++++++++++++
 .../built-ins/Date/parse/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/getDate/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/getDay/not-a-constructor.js     | 27 +++++++++++++++++++
 .../getFullYear/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/getHours/not-a-constructor.js   | 27 +++++++++++++++++++
 .../getMilliseconds/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/getMinutes/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/getMonth/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/getSeconds/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/getTime/not-a-constructor.js    | 27 +++++++++++++++++++
 .../getTimezoneOffset/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/getUTCDate/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/getUTCDay/not-a-constructor.js  | 27 +++++++++++++++++++
 .../getUTCFullYear/not-a-constructor.js       | 27 +++++++++++++++++++
 .../getUTCHours/not-a-constructor.js          | 27 +++++++++++++++++++
 .../getUTCMilliseconds/not-a-constructor.js   | 27 +++++++++++++++++++
 .../getUTCMinutes/not-a-constructor.js        | 27 +++++++++++++++++++
 .../getUTCMonth/not-a-constructor.js          | 27 +++++++++++++++++++
 .../getUTCSeconds/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/setDate/not-a-constructor.js    | 27 +++++++++++++++++++
 .../setFullYear/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/setHours/not-a-constructor.js   | 27 +++++++++++++++++++
 .../setMilliseconds/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/setMinutes/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/setMonth/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/setSeconds/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/setTime/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/setUTCDate/not-a-constructor.js | 27 +++++++++++++++++++
 .../setUTCFullYear/not-a-constructor.js       | 27 +++++++++++++++++++
 .../setUTCHours/not-a-constructor.js          | 27 +++++++++++++++++++
 .../setUTCMilliseconds/not-a-constructor.js   | 27 +++++++++++++++++++
 .../setUTCMinutes/not-a-constructor.js        | 27 +++++++++++++++++++
 .../setUTCMonth/not-a-constructor.js          | 27 +++++++++++++++++++
 .../setUTCSeconds/not-a-constructor.js        | 27 +++++++++++++++++++
 .../toDateString/not-a-constructor.js         | 27 +++++++++++++++++++
 .../toISOString/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/toJSON/not-a-constructor.js     | 27 +++++++++++++++++++
 .../toLocaleDateString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 27 +++++++++++++++++++
 .../toLocaleTimeString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../toTimeString/not-a-constructor.js         | 27 +++++++++++++++++++
 .../toUTCString/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../cleanupSome/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/register/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/unregister/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/apply/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/bind/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/call/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../next/not-a-constructor.js                 | 27 +++++++++++++++++++
 .../return/not-a-constructor.js               | 27 +++++++++++++++++++
 .../throw/not-a-constructor.js                | 27 +++++++++++++++++++
 .../built-ins/JSON/parse/not-a-constructor.js | 23 ++++++++++++++++
 .../JSON/stringify/not-a-constructor.js       | 23 ++++++++++++++++
 .../Symbol.iterator/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Map/prototype/clear/not-a-constructor.js  | 23 ++++++++++++++++
 .../Map/prototype/delete/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/entries/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/forEach/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Map/prototype/get/not-a-constructor.js    | 23 ++++++++++++++++
 .../Map/prototype/has/not-a-constructor.js    | 23 ++++++++++++++++
 .../Map/prototype/keys/not-a-constructor.js   | 23 ++++++++++++++++
 .../Map/prototype/set/not-a-constructor.js    | 23 ++++++++++++++++
 .../Map/prototype/values/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/abs/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/acos/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/acosh/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/asin/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/asinh/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/atan/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/atan2/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/atanh/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/cbrt/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/ceil/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/clz32/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/cos/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/cosh/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/exp/not-a-constructor.js  | 23 ++++++++++++++++
 .../built-ins/Math/expm1/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/floor/not-a-constructor.js | 23 ++++++++++++++++
 .../Math/fround/not-a-constructor.js          | 23 ++++++++++++++++
 .../built-ins/Math/hypot/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/imul/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/log/not-a-constructor.js  | 23 ++++++++++++++++
 .../built-ins/Math/log10/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/log1p/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/log2/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/max/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/min/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/pow/not-a-constructor.js  | 23 ++++++++++++++++
 .../Math/random/not-a-constructor.js          | 23 ++++++++++++++++
 .../built-ins/Math/round/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/sign/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/sin/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/sinh/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/sqrt/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/Math/tan/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/Math/tanh/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Math/trunc/not-a-constructor.js | 23 ++++++++++++++++
 .../Number/isFinite/not-a-constructor.js      | 23 ++++++++++++++++
 .../Number/isInteger/not-a-constructor.js     | 23 ++++++++++++++++
 .../Number/isNaN/not-a-constructor.js         | 23 ++++++++++++++++
 .../Number/isSafeInteger/not-a-constructor.js | 23 ++++++++++++++++
 .../Number/parseFloat/not-a-constructor.js    | 23 ++++++++++++++++
 .../Number/parseInt/not-a-constructor.js      | 23 ++++++++++++++++
 .../toExponential/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/toFixed/not-a-constructor.js    | 27 +++++++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 27 +++++++++++++++++++
 .../toPrecision/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Object/assign/not-a-constructor.js        | 23 ++++++++++++++++
 .../Object/create/not-a-constructor.js        | 23 ++++++++++++++++
 .../defineProperties/not-a-constructor.js     | 27 +++++++++++++++++++
 .../defineProperty/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Object/entries/not-a-constructor.js       | 23 ++++++++++++++++
 .../Object/freeze/not-a-constructor.js        | 23 ++++++++++++++++
 .../Object/fromEntries/not-a-constructor.js   | 23 ++++++++++++++++
 .../not-a-constructor.js                      | 27 +++++++++++++++++++
 .../not-a-constructor.js                      | 27 +++++++++++++++++++
 .../getOwnPropertyNames/not-a-constructor.js  | 27 +++++++++++++++++++
 .../not-a-constructor.js                      | 27 +++++++++++++++++++
 .../getPrototypeOf/not-a-constructor.js       | 27 +++++++++++++++++++
 test/built-ins/Object/is/not-a-constructor.js | 23 ++++++++++++++++
 .../Object/isExtensible/not-a-constructor.js  | 23 ++++++++++++++++
 .../Object/isFrozen/not-a-constructor.js      | 23 ++++++++++++++++
 .../Object/isSealed/not-a-constructor.js      | 23 ++++++++++++++++
 .../Object/keys/not-a-constructor.js          | 23 ++++++++++++++++
 .../preventExtensions/not-a-constructor.js    | 27 +++++++++++++++++++
 .../hasOwnProperty/not-a-constructor.js       | 27 +++++++++++++++++++
 .../isPrototypeOf/not-a-constructor.js        | 27 +++++++++++++++++++
 .../propertyIsEnumerable/not-a-constructor.js | 27 +++++++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Object/seal/not-a-constructor.js          | 23 ++++++++++++++++
 .../setPrototypeOf/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Object/values/not-a-constructor.js        | 23 ++++++++++++++++
 .../Promise/all/not-a-constructor.js          | 23 ++++++++++++++++
 .../Promise/allSettled/not-a-constructor.js   | 23 ++++++++++++++++
 .../Promise/any/not-a-constructor.js          | 23 ++++++++++++++++
 .../prototype/catch/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/finally/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/then/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Promise/race/not-a-constructor.js         | 23 ++++++++++++++++
 .../Promise/reject/not-a-constructor.js       | 23 ++++++++++++++++
 .../Promise/resolve/not-a-constructor.js      | 23 ++++++++++++++++
 .../Reflect/apply/not-a-constructor.js        | 23 ++++++++++++++++
 .../Reflect/construct/not-a-constructor.js    | 23 ++++++++++++++++
 .../defineProperty/not-a-constructor.js       | 27 +++++++++++++++++++
 .../deleteProperty/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Reflect/get/not-a-constructor.js          | 23 ++++++++++++++++
 .../not-a-constructor.js                      | 27 +++++++++++++++++++
 .../getPrototypeOf/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Reflect/has/not-a-constructor.js          | 23 ++++++++++++++++
 .../Reflect/isExtensible/not-a-constructor.js | 23 ++++++++++++++++
 .../Reflect/ownKeys/not-a-constructor.js      | 23 ++++++++++++++++
 .../preventExtensions/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Reflect/set/not-a-constructor.js          | 23 ++++++++++++++++
 .../setPrototypeOf/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Symbol.match/not-a-constructor.js         | 27 +++++++++++++++++++
 .../Symbol.matchAll/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Symbol.replace/not-a-constructor.js       | 27 +++++++++++++++++++
 .../Symbol.search/not-a-constructor.js        | 27 +++++++++++++++++++
 .../Symbol.split/not-a-constructor.js         | 27 +++++++++++++++++++
 .../prototype/exec/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/test/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../Symbol.iterator/not-a-constructor.js      | 27 +++++++++++++++++++
 .../Set/prototype/add/not-a-constructor.js    | 23 ++++++++++++++++
 .../Set/prototype/clear/not-a-constructor.js  | 23 ++++++++++++++++
 .../Set/prototype/delete/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/entries/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/forEach/not-a-constructor.js    | 27 +++++++++++++++++++
 .../Set/prototype/has/not-a-constructor.js    | 23 ++++++++++++++++
 .../Set/prototype/values/not-a-constructor.js | 23 ++++++++++++++++
 .../prototype/slice/not-a-constructor.js      | 27 +++++++++++++++++++
 .../String/fromCharCode/not-a-constructor.js  | 23 ++++++++++++++++
 .../String/fromCodePoint/not-a-constructor.js | 23 ++++++++++++++++
 .../Symbol.iterator/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/charAt/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/charCodeAt/not-a-constructor.js | 27 +++++++++++++++++++
 .../codePointAt/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/concat/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/endsWith/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/includes/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/indexOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../lastIndexOf/not-a-constructor.js          | 27 +++++++++++++++++++
 .../localeCompare/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/match/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/matchAll/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/normalize/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/padEnd/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/padStart/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/repeat/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/replace/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/replaceAll/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/search/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/slice/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/split/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/startsWith/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/substring/not-a-constructor.js  | 27 +++++++++++++++++++
 .../toLocaleLowerCase/not-a-constructor.js    | 27 +++++++++++++++++++
 .../toLocaleUpperCase/not-a-constructor.js    | 27 +++++++++++++++++++
 .../toLowerCase/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../toUpperCase/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/trim/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/trimEnd/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/trimStart/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../built-ins/String/raw/not-a-constructor.js | 23 ++++++++++++++++
 .../built-ins/Symbol/for/not-a-constructor.js | 23 ++++++++++++++++
 .../Symbol/keyFor/not-a-constructor.js        | 23 ++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/valueOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../TypedArray/from/not-a-constructor.js      | 23 ++++++++++++++++
 .../TypedArray/of/not-a-constructor.js        | 23 ++++++++++++++++
 .../Symbol.iterator/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/copyWithin/not-a-constructor.js | 27 +++++++++++++++++++
 .../prototype/entries/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/every/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/fill/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/filter/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/find/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/findIndex/not-a-constructor.js  | 27 +++++++++++++++++++
 .../prototype/forEach/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/includes/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/indexOf/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/join/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/keys/not-a-constructor.js       | 27 +++++++++++++++++++
 .../lastIndexOf/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/map/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/reduce/not-a-constructor.js     | 27 +++++++++++++++++++
 .../reduceRight/not-a-constructor.js          | 27 +++++++++++++++++++
 .../prototype/reverse/not-a-constructor.js    | 27 +++++++++++++++++++
 .../prototype/set/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/slice/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/some/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/sort/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/subarray/not-a-constructor.js   | 27 +++++++++++++++++++
 .../toLocaleString/not-a-constructor.js       | 27 +++++++++++++++++++
 .../prototype/toString/not-a-constructor.js   | 27 +++++++++++++++++++
 .../prototype/values/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/delete/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/get/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/has/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/set/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/deref/not-a-constructor.js      | 27 +++++++++++++++++++
 .../prototype/add/not-a-constructor.js        | 27 +++++++++++++++++++
 .../prototype/delete/not-a-constructor.js     | 27 +++++++++++++++++++
 .../prototype/has/not-a-constructor.js        | 27 +++++++++++++++++++
 test/built-ins/decodeURI/not-a-constructor.js | 23 ++++++++++++++++
 .../decodeURIComponent/not-a-constructor.js   | 23 ++++++++++++++++
 test/built-ins/encodeURI/not-a-constructor.js | 23 ++++++++++++++++
 .../encodeURIComponent/not-a-constructor.js   | 23 ++++++++++++++++
 test/built-ins/eval/not-a-constructor.js      | 23 ++++++++++++++++
 test/built-ins/isFinite/not-a-constructor.js  | 23 ++++++++++++++++
 test/built-ins/isNaN/not-a-constructor.js     | 23 ++++++++++++++++
 .../built-ins/parseFloat/not-a-constructor.js | 23 ++++++++++++++++
 test/built-ins/parseInt/not-a-constructor.js  | 23 +++++++++++-----
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 create mode 100644 test/built-ins/String/prototype/toLocaleLowerCase/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/toLocaleUpperCase/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/toLowerCase/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/toString/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/toUpperCase/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/trim/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/trimEnd/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/trimStart/not-a-constructor.js
 create mode 100644 test/built-ins/String/prototype/valueOf/not-a-constructor.js
 create mode 100644 test/built-ins/String/raw/not-a-constructor.js
 create mode 100644 test/built-ins/Symbol/for/not-a-constructor.js
 create mode 100644 test/built-ins/Symbol/keyFor/not-a-constructor.js
 create mode 100644 test/built-ins/Symbol/prototype/toString/not-a-constructor.js
 create mode 100644 test/built-ins/Symbol/prototype/valueOf/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/from/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/of/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/Symbol.iterator/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/copyWithin/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/entries/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/every/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/fill/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/filter/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/find/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/findIndex/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/forEach/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/includes/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/indexOf/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/join/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/keys/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/lastIndexOf/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/map/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/reduce/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/reduceRight/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/reverse/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/set/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/slice/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/some/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/sort/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/subarray/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/toLocaleString/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/toString/not-a-constructor.js
 create mode 100644 test/built-ins/TypedArray/prototype/values/not-a-constructor.js
 create mode 100644 test/built-ins/WeakMap/prototype/delete/not-a-constructor.js
 create mode 100644 test/built-ins/WeakMap/prototype/get/not-a-constructor.js
 create mode 100644 test/built-ins/WeakMap/prototype/has/not-a-constructor.js
 create mode 100644 test/built-ins/WeakMap/prototype/set/not-a-constructor.js
 create mode 100644 test/built-ins/WeakRef/prototype/deref/not-a-constructor.js
 create mode 100644 test/built-ins/WeakSet/prototype/add/not-a-constructor.js
 create mode 100644 test/built-ins/WeakSet/prototype/delete/not-a-constructor.js
 create mode 100644 test/built-ins/WeakSet/prototype/has/not-a-constructor.js
 create mode 100644 test/built-ins/decodeURI/not-a-constructor.js
 create mode 100644 test/built-ins/decodeURIComponent/not-a-constructor.js
 create mode 100644 test/built-ins/encodeURI/not-a-constructor.js
 create mode 100644 test/built-ins/encodeURIComponent/not-a-constructor.js
 create mode 100644 test/built-ins/eval/not-a-constructor.js
 create mode 100644 test/built-ins/isFinite/not-a-constructor.js
 create mode 100644 test/built-ins/isNaN/not-a-constructor.js
 create mode 100644 test/built-ins/parseFloat/not-a-constructor.js

diff --git a/test/annexB/built-ins/Date/prototype/getYear/not-a-constructor.js b/test/annexB/built-ins/Date/prototype/getYear/not-a-constructor.js
new file mode 100644
index 0000000000..48c11a17b8
--- /dev/null
+++ b/test/annexB/built-ins/Date/prototype/getYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getYear),
+  false,
+  'isConstructor(Date.prototype.getYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getYear();
+}, '`let date = new Date(Date.now()); new date.getYear()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/Date/prototype/setYear/not-a-constructor.js b/test/annexB/built-ins/Date/prototype/setYear/not-a-constructor.js
new file mode 100644
index 0000000000..10747a3bcf
--- /dev/null
+++ b/test/annexB/built-ins/Date/prototype/setYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setYear),
+  false,
+  'isConstructor(Date.prototype.setYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setYear();
+}, '`let date = new Date(Date.now()); new date.setYear()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/Date/prototype/toGMTString/not-a-constructor.js b/test/annexB/built-ins/Date/prototype/toGMTString/not-a-constructor.js
new file mode 100644
index 0000000000..8dbfb4d235
--- /dev/null
+++ b/test/annexB/built-ins/Date/prototype/toGMTString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toGMTString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toGMTString),
+  false,
+  'isConstructor(Date.prototype.toGMTString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toGMTString();
+}, '`let date = new Date(Date.now()); new date.toGMTString()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/anchor/not-a-constructor.js b/test/annexB/built-ins/String/prototype/anchor/not-a-constructor.js
new file mode 100644
index 0000000000..c2e6d50336
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/anchor/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.anchor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.anchor),
+  false,
+  'isConstructor(String.prototype.anchor) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.anchor();
+}, '`new String.prototype.anchor()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/big/not-a-constructor.js b/test/annexB/built-ins/String/prototype/big/not-a-constructor.js
new file mode 100644
index 0000000000..4fadddfc58
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/big/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.big does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.prototype.big), false, 'isConstructor(String.prototype.big) must return false');
+
+assert.throws(TypeError, () => {
+  new String.prototype.big();
+}, '`new String.prototype.big()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/blink/not-a-constructor.js b/test/annexB/built-ins/String/prototype/blink/not-a-constructor.js
new file mode 100644
index 0000000000..7ea9690c3c
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/blink/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.blink does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.blink),
+  false,
+  'isConstructor(String.prototype.blink) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.blink();
+}, '`new String.prototype.blink()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/bold/not-a-constructor.js b/test/annexB/built-ins/String/prototype/bold/not-a-constructor.js
new file mode 100644
index 0000000000..eadee9bce6
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/bold/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.bold does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.bold),
+  false,
+  'isConstructor(String.prototype.bold) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.bold();
+}, '`new String.prototype.bold()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/fixed/not-a-constructor.js b/test/annexB/built-ins/String/prototype/fixed/not-a-constructor.js
new file mode 100644
index 0000000000..2480eedbb1
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/fixed/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.fixed does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.fixed),
+  false,
+  'isConstructor(String.prototype.fixed) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.fixed();
+}, '`new String.prototype.fixed()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/fontcolor/not-a-constructor.js b/test/annexB/built-ins/String/prototype/fontcolor/not-a-constructor.js
new file mode 100644
index 0000000000..177125f9bd
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/fontcolor/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.fontcolor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.fontcolor),
+  false,
+  'isConstructor(String.prototype.fontcolor) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.fontcolor();
+}, '`new String.prototype.fontcolor()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/fontsize/not-a-constructor.js b/test/annexB/built-ins/String/prototype/fontsize/not-a-constructor.js
new file mode 100644
index 0000000000..58a7930e91
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/fontsize/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.fontsize does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.fontsize),
+  false,
+  'isConstructor(String.prototype.fontsize) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.fontsize();
+}, '`new String.prototype.fontsize()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/italics/not-a-constructor.js b/test/annexB/built-ins/String/prototype/italics/not-a-constructor.js
new file mode 100644
index 0000000000..67728cc22c
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/italics/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.italics does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.italics),
+  false,
+  'isConstructor(String.prototype.italics) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.italics();
+}, '`new String.prototype.italics()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/link/not-a-constructor.js b/test/annexB/built-ins/String/prototype/link/not-a-constructor.js
new file mode 100644
index 0000000000..84db07b0a0
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/link/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.link does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.link),
+  false,
+  'isConstructor(String.prototype.link) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.link();
+}, '`new String.prototype.link()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/small/not-a-constructor.js b/test/annexB/built-ins/String/prototype/small/not-a-constructor.js
new file mode 100644
index 0000000000..1597070fc5
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/small/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.small does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.small),
+  false,
+  'isConstructor(String.prototype.small) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.small();
+}, '`new String.prototype.small()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/strike/not-a-constructor.js b/test/annexB/built-ins/String/prototype/strike/not-a-constructor.js
new file mode 100644
index 0000000000..b34a1fa6fc
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/strike/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.strike does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.strike),
+  false,
+  'isConstructor(String.prototype.strike) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.strike();
+}, '`new String.prototype.strike()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/sub/not-a-constructor.js b/test/annexB/built-ins/String/prototype/sub/not-a-constructor.js
new file mode 100644
index 0000000000..d1647a7605
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/sub/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.sub does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.prototype.sub), false, 'isConstructor(String.prototype.sub) must return false');
+
+assert.throws(TypeError, () => {
+  new String.prototype.sub();
+}, '`new String.prototype.sub()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/substr/not-a-constructor.js b/test/annexB/built-ins/String/prototype/substr/not-a-constructor.js
new file mode 100644
index 0000000000..82cf786060
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/substr/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.substr does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.substr),
+  false,
+  'isConstructor(String.prototype.substr) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.substr();
+}, '`new String.prototype.substr()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/String/prototype/sup/not-a-constructor.js b/test/annexB/built-ins/String/prototype/sup/not-a-constructor.js
new file mode 100644
index 0000000000..5f6598f2bd
--- /dev/null
+++ b/test/annexB/built-ins/String/prototype/sup/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.sup does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.prototype.sup), false, 'isConstructor(String.prototype.sup) must return false');
+
+assert.throws(TypeError, () => {
+  new String.prototype.sup();
+}, '`new String.prototype.sup()` throws TypeError');
+    
diff --git a/test/annexB/built-ins/escape/not-a-constructor.js b/test/annexB/built-ins/escape/not-a-constructor.js
new file mode 100644
index 0000000000..41c8d88db8
--- /dev/null
+++ b/test/annexB/built-ins/escape/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  escape does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(escape), false, 'isConstructor(escape) must return false');
+
+assert.throws(TypeError, () => {
+  new escape('');
+}, '`new escape(\'\')` throws TypeError');
+    
diff --git a/test/annexB/built-ins/unescape/not-a-constructor.js b/test/annexB/built-ins/unescape/not-a-constructor.js
new file mode 100644
index 0000000000..9c6b92eba4
--- /dev/null
+++ b/test/annexB/built-ins/unescape/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  unescape does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(unescape), false, 'isConstructor(unescape) must return false');
+
+assert.throws(TypeError, () => {
+  new unescape('');
+}, '`new unescape(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/Array/from/not-a-constructor.js b/test/built-ins/Array/from/not-a-constructor.js
new file mode 100644
index 0000000000..e7d7885d16
--- /dev/null
+++ b/test/built-ins/Array/from/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.from does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.from), false, 'isConstructor(Array.from) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.from([]);
+}, '`new Array.from([])` throws TypeError');
+    
diff --git a/test/built-ins/Array/isArray/not-a-constructor.js b/test/built-ins/Array/isArray/not-a-constructor.js
new file mode 100644
index 0000000000..7c03bf80df
--- /dev/null
+++ b/test/built-ins/Array/isArray/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.isArray does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.isArray), false, 'isConstructor(Array.isArray) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.isArray([]);
+}, '`new Array.isArray([])` throws TypeError');
+    
diff --git a/test/built-ins/Array/of/not-a-constructor.js b/test/built-ins/Array/of/not-a-constructor.js
index 9c15fe739c..a9b910cceb 100644
--- a/test/built-ins/Array/of/not-a-constructor.js
+++ b/test/built-ins/Array/of/not-a-constructor.js
@@ -1,11 +1,23 @@
-// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
+
 /*---
-esid: sec-array.of
+esid: sec-ecmascript-standard-built-in-objects
 description: >
-  Array.of is not a constructor.
+  Array.of does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
 ---*/
 
-assert.throws(TypeError, function() {
-  new Array.of();
-});
+assert.sameValue(isConstructor(Array.of), false, 'isConstructor(Array.of) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.of(1);
+}, '`new Array.of(1)` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js b/test/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..fd5d038c04
--- /dev/null
+++ b/test/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype[Symbol.iterator] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(Array.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype[Symbol.iterator]();
+}, '`new Array.prototype[Symbol.iterator]()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/concat/not-a-constructor.js b/test/built-ins/Array/prototype/concat/not-a-constructor.js
index c69c22c7b5..c89304c29d 100644
--- a/test/built-ins/Array/prototype/concat/not-a-constructor.js
+++ b/test/built-ins/Array/prototype/concat/not-a-constructor.js
@@ -1,22 +1,27 @@
-// Copyright (C) 2017 Leo Balter. All rights reserved.
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-array.prototype.concat
+esid: sec-ecmascript-standard-built-in-objects
 description: >
-  Array.prototype.concat is not a constructor.
+  Array.prototype.concat does not implement [[Construct]]
 info: |
-  17 ECMAScript Standard Built-in Objects
+  ECMAScript Function Objects
 
   Built-in function objects that are not identified as constructors do not
   implement the [[Construct]] internal method unless otherwise specified in
   the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
 ---*/
 
-assert.throws(TypeError, function() {
-  new Array.prototype.concat();
-});
+assert.sameValue(
+  isConstructor(Array.prototype.concat),
+  false,
+  'isConstructor(Array.prototype.concat) must return false'
+);
 
-assert.throws(TypeError, function() {
-  new [].concat();
-});
+assert.throws(TypeError, () => {
+  new Array.prototype.concat([]);
+}, '`new Array.prototype.concat([])` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/copyWithin/not-a-constructor.js b/test/built-ins/Array/prototype/copyWithin/not-a-constructor.js
new file mode 100644
index 0000000000..caf8907205
--- /dev/null
+++ b/test/built-ins/Array/prototype/copyWithin/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.copyWithin does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.copyWithin),
+  false,
+  'isConstructor(Array.prototype.copyWithin) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.copyWithin();
+}, '`new Array.prototype.copyWithin()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/entries/not-a-constructor.js b/test/built-ins/Array/prototype/entries/not-a-constructor.js
new file mode 100644
index 0000000000..d4ab797a3f
--- /dev/null
+++ b/test/built-ins/Array/prototype/entries/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.entries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.entries),
+  false,
+  'isConstructor(Array.prototype.entries) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.entries();
+}, '`new Array.prototype.entries()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/every/not-a-constructor.js b/test/built-ins/Array/prototype/every/not-a-constructor.js
new file mode 100644
index 0000000000..76a9149243
--- /dev/null
+++ b/test/built-ins/Array/prototype/every/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.every does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.every),
+  false,
+  'isConstructor(Array.prototype.every) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.every(() => {});
+}, '`new Array.prototype.every(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/fill/not-a-constructor.js b/test/built-ins/Array/prototype/fill/not-a-constructor.js
new file mode 100644
index 0000000000..18529fa6b5
--- /dev/null
+++ b/test/built-ins/Array/prototype/fill/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.fill does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.fill), false, 'isConstructor(Array.prototype.fill) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.fill();
+}, '`new Array.prototype.fill()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/filter/not-a-constructor.js b/test/built-ins/Array/prototype/filter/not-a-constructor.js
new file mode 100644
index 0000000000..2bd20be1f9
--- /dev/null
+++ b/test/built-ins/Array/prototype/filter/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.filter does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.filter),
+  false,
+  'isConstructor(Array.prototype.filter) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.filter(() => {});
+}, '`new Array.prototype.filter(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/find/not-a-constructor.js b/test/built-ins/Array/prototype/find/not-a-constructor.js
new file mode 100644
index 0000000000..f8b7a8b87d
--- /dev/null
+++ b/test/built-ins/Array/prototype/find/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.find does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.find), false, 'isConstructor(Array.prototype.find) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.find(() => {});
+}, '`new Array.prototype.find(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/findIndex/not-a-constructor.js b/test/built-ins/Array/prototype/findIndex/not-a-constructor.js
new file mode 100644
index 0000000000..5580d84842
--- /dev/null
+++ b/test/built-ins/Array/prototype/findIndex/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.findIndex does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.findIndex),
+  false,
+  'isConstructor(Array.prototype.findIndex) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.findIndex(() => {});
+}, '`new Array.prototype.findIndex(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/flat/not-a-constructor.js b/test/built-ins/Array/prototype/flat/not-a-constructor.js
new file mode 100644
index 0000000000..175dbbbc6b
--- /dev/null
+++ b/test/built-ins/Array/prototype/flat/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.flat does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.flat), false, 'isConstructor(Array.prototype.flat) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.flat();
+}, '`new Array.prototype.flat()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/flatMap/not-a-constructor.js b/test/built-ins/Array/prototype/flatMap/not-a-constructor.js
new file mode 100644
index 0000000000..df68c99001
--- /dev/null
+++ b/test/built-ins/Array/prototype/flatMap/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.flatMap does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Array.prototype.flatMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.flatMap),
+  false,
+  'isConstructor(Array.prototype.flatMap) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.flatMap(() => {});
+}, '`new Array.prototype.flatMap(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/forEach/not-a-constructor.js b/test/built-ins/Array/prototype/forEach/not-a-constructor.js
new file mode 100644
index 0000000000..a59663c63b
--- /dev/null
+++ b/test/built-ins/Array/prototype/forEach/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.forEach does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.forEach),
+  false,
+  'isConstructor(Array.prototype.forEach) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.forEach(() => {});
+}, '`new Array.prototype.forEach(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/includes/not-a-constructor.js b/test/built-ins/Array/prototype/includes/not-a-constructor.js
new file mode 100644
index 0000000000..da056dc0cb
--- /dev/null
+++ b/test/built-ins/Array/prototype/includes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.includes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.includes),
+  false,
+  'isConstructor(Array.prototype.includes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.includes(1);
+}, '`new Array.prototype.includes(1)` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/indexOf/not-a-constructor.js b/test/built-ins/Array/prototype/indexOf/not-a-constructor.js
new file mode 100644
index 0000000000..bfbd77cf78
--- /dev/null
+++ b/test/built-ins/Array/prototype/indexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.indexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.indexOf),
+  false,
+  'isConstructor(Array.prototype.indexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.indexOf();
+}, '`new Array.prototype.indexOf()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/join/not-a-constructor.js b/test/built-ins/Array/prototype/join/not-a-constructor.js
new file mode 100644
index 0000000000..26196adf37
--- /dev/null
+++ b/test/built-ins/Array/prototype/join/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.join does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.join), false, 'isConstructor(Array.prototype.join) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.join();
+}, '`new Array.prototype.join()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/keys/not-a-constructor.js b/test/built-ins/Array/prototype/keys/not-a-constructor.js
new file mode 100644
index 0000000000..f99bfd7a32
--- /dev/null
+++ b/test/built-ins/Array/prototype/keys/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.keys does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.keys), false, 'isConstructor(Array.prototype.keys) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.keys();
+}, '`new Array.prototype.keys()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js b/test/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
new file mode 100644
index 0000000000..ed4de49a51
--- /dev/null
+++ b/test/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.lastIndexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.lastIndexOf),
+  false,
+  'isConstructor(Array.prototype.lastIndexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.lastIndexOf();
+}, '`new Array.prototype.lastIndexOf()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/map/not-a-constructor.js b/test/built-ins/Array/prototype/map/not-a-constructor.js
new file mode 100644
index 0000000000..ebb238a953
--- /dev/null
+++ b/test/built-ins/Array/prototype/map/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.map does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.map), false, 'isConstructor(Array.prototype.map) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.map(() => {});
+}, '`new Array.prototype.map(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/pop/not-a-constructor.js b/test/built-ins/Array/prototype/pop/not-a-constructor.js
new file mode 100644
index 0000000000..7645728768
--- /dev/null
+++ b/test/built-ins/Array/prototype/pop/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.pop does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.pop), false, 'isConstructor(Array.prototype.pop) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.pop();
+}, '`new Array.prototype.pop()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/push/not-a-constructor.js b/test/built-ins/Array/prototype/push/not-a-constructor.js
new file mode 100644
index 0000000000..35fc7fe1f4
--- /dev/null
+++ b/test/built-ins/Array/prototype/push/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.push does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.push), false, 'isConstructor(Array.prototype.push) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.push();
+}, '`new Array.prototype.push()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/reduce/not-a-constructor.js b/test/built-ins/Array/prototype/reduce/not-a-constructor.js
new file mode 100644
index 0000000000..ab3e31e034
--- /dev/null
+++ b/test/built-ins/Array/prototype/reduce/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reduce does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reduce),
+  false,
+  'isConstructor(Array.prototype.reduce) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reduce(() => {}, []);
+}, '`new Array.prototype.reduce(() => {}, [])` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/reduceRight/not-a-constructor.js b/test/built-ins/Array/prototype/reduceRight/not-a-constructor.js
new file mode 100644
index 0000000000..e2c8b50c70
--- /dev/null
+++ b/test/built-ins/Array/prototype/reduceRight/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reduceRight does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reduceRight),
+  false,
+  'isConstructor(Array.prototype.reduceRight) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reduceRight(() => {}, []);
+}, '`new Array.prototype.reduceRight(() => {}, [])` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/reverse/not-a-constructor.js b/test/built-ins/Array/prototype/reverse/not-a-constructor.js
new file mode 100644
index 0000000000..dea81129d2
--- /dev/null
+++ b/test/built-ins/Array/prototype/reverse/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reverse does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reverse),
+  false,
+  'isConstructor(Array.prototype.reverse) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reverse();
+}, '`new Array.prototype.reverse()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/shift/not-a-constructor.js b/test/built-ins/Array/prototype/shift/not-a-constructor.js
new file mode 100644
index 0000000000..75d95e96ec
--- /dev/null
+++ b/test/built-ins/Array/prototype/shift/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.shift does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.shift),
+  false,
+  'isConstructor(Array.prototype.shift) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.shift();
+}, '`new Array.prototype.shift()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/slice/not-a-constructor.js b/test/built-ins/Array/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..815923c1a6
--- /dev/null
+++ b/test/built-ins/Array/prototype/slice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.slice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.slice),
+  false,
+  'isConstructor(Array.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.slice();
+}, '`new Array.prototype.slice()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/some/not-a-constructor.js b/test/built-ins/Array/prototype/some/not-a-constructor.js
new file mode 100644
index 0000000000..d383bd7761
--- /dev/null
+++ b/test/built-ins/Array/prototype/some/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.some does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.some), false, 'isConstructor(Array.prototype.some) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.some(() => {});
+}, '`new Array.prototype.some(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/sort/not-a-constructor.js b/test/built-ins/Array/prototype/sort/not-a-constructor.js
new file mode 100644
index 0000000000..4a5d17a479
--- /dev/null
+++ b/test/built-ins/Array/prototype/sort/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.sort does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.sort), false, 'isConstructor(Array.prototype.sort) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.sort();
+}, '`new Array.prototype.sort()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/splice/not-a-constructor.js b/test/built-ins/Array/prototype/splice/not-a-constructor.js
new file mode 100644
index 0000000000..c8036193da
--- /dev/null
+++ b/test/built-ins/Array/prototype/splice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.splice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.splice),
+  false,
+  'isConstructor(Array.prototype.splice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.splice();
+}, '`new Array.prototype.splice()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..aa9f41faa3
--- /dev/null
+++ b/test/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toLocaleString),
+  false,
+  'isConstructor(Array.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toLocaleString();
+}, '`new Array.prototype.toLocaleString()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/toString/not-a-constructor.js b/test/built-ins/Array/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..1c69f18c98
--- /dev/null
+++ b/test/built-ins/Array/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toString),
+  false,
+  'isConstructor(Array.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toString();
+}, '`new Array.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/unshift/not-a-constructor.js b/test/built-ins/Array/prototype/unshift/not-a-constructor.js
new file mode 100644
index 0000000000..10d8a571a6
--- /dev/null
+++ b/test/built-ins/Array/prototype/unshift/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.unshift does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.unshift),
+  false,
+  'isConstructor(Array.prototype.unshift) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.unshift();
+}, '`new Array.prototype.unshift()` throws TypeError');
+    
diff --git a/test/built-ins/Array/prototype/values/not-a-constructor.js b/test/built-ins/Array/prototype/values/not-a-constructor.js
new file mode 100644
index 0000000000..f4d4f218df
--- /dev/null
+++ b/test/built-ins/Array/prototype/values/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.values does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Array.prototype.values, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.values),
+  false,
+  'isConstructor(Array.prototype.values) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.values();
+}, '`new Array.prototype.values()` throws TypeError');
+    
diff --git a/test/built-ins/ArrayBuffer/isView/not-a-constructor.js b/test/built-ins/ArrayBuffer/isView/not-a-constructor.js
new file mode 100644
index 0000000000..ff1a276b44
--- /dev/null
+++ b/test/built-ins/ArrayBuffer/isView/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  ArrayBuffer.isView does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, ArrayBuffer, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(ArrayBuffer.isView), false, 'isConstructor(ArrayBuffer.isView) must return false');
+
+assert.throws(TypeError, () => {
+  new ArrayBuffer.isView();
+}, '`new ArrayBuffer.isView()` throws TypeError');
+    
diff --git a/test/built-ins/ArrayBuffer/prototype/slice/not-a-constructor.js b/test/built-ins/ArrayBuffer/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..cfff6b314e
--- /dev/null
+++ b/test/built-ins/ArrayBuffer/prototype/slice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  ArrayBuffer.prototype.slice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, ArrayBuffer, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(ArrayBuffer.prototype.slice),
+  false,
+  'isConstructor(ArrayBuffer.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let ab = new ArrayBuffer(); new ab.slice();
+}, '`let ab = new ArrayBuffer(); new ab.slice()` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/add/not-a-constructor.js b/test/built-ins/Atomics/add/not-a-constructor.js
new file mode 100644
index 0000000000..b582a354ac
--- /dev/null
+++ b/test/built-ins/Atomics/add/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.add does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.add), false, 'isConstructor(Atomics.add) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.add(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.add(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/and/not-a-constructor.js b/test/built-ins/Atomics/and/not-a-constructor.js
new file mode 100644
index 0000000000..f0d2722fc7
--- /dev/null
+++ b/test/built-ins/Atomics/and/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.and does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.and), false, 'isConstructor(Atomics.and) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.and(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.and(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/compareExchange/not-a-constructor.js b/test/built-ins/Atomics/compareExchange/not-a-constructor.js
new file mode 100644
index 0000000000..09437acffa
--- /dev/null
+++ b/test/built-ins/Atomics/compareExchange/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.compareExchange does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(Atomics.compareExchange),
+  false,
+  'isConstructor(Atomics.compareExchange) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Atomics.compareExchange(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.compareExchange(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/exchange/not-a-constructor.js b/test/built-ins/Atomics/exchange/not-a-constructor.js
new file mode 100644
index 0000000000..7e667e324f
--- /dev/null
+++ b/test/built-ins/Atomics/exchange/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.exchange does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.exchange), false, 'isConstructor(Atomics.exchange) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.exchange(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.exchange(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/isLockFree/not-a-constructor.js b/test/built-ins/Atomics/isLockFree/not-a-constructor.js
new file mode 100644
index 0000000000..eddec8eb9d
--- /dev/null
+++ b/test/built-ins/Atomics/isLockFree/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.isLockFree does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.isLockFree), false, 'isConstructor(Atomics.isLockFree) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.isLockFree(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.isLockFree(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/load/not-a-constructor.js b/test/built-ins/Atomics/load/not-a-constructor.js
new file mode 100644
index 0000000000..49ae3ef469
--- /dev/null
+++ b/test/built-ins/Atomics/load/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.load does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.load), false, 'isConstructor(Atomics.load) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.load(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.load(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/notify/not-a-constructor.js b/test/built-ins/Atomics/notify/not-a-constructor.js
new file mode 100644
index 0000000000..eb454b899f
--- /dev/null
+++ b/test/built-ins/Atomics/notify/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.notify does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.notify), false, 'isConstructor(Atomics.notify) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/or/not-a-constructor.js b/test/built-ins/Atomics/or/not-a-constructor.js
new file mode 100644
index 0000000000..4b8bb0dffe
--- /dev/null
+++ b/test/built-ins/Atomics/or/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.or does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.or), false, 'isConstructor(Atomics.or) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.or(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.or(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/store/not-a-constructor.js b/test/built-ins/Atomics/store/not-a-constructor.js
new file mode 100644
index 0000000000..3c7eb8903c
--- /dev/null
+++ b/test/built-ins/Atomics/store/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.store does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.store), false, 'isConstructor(Atomics.store) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.store(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.store(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/sub/not-a-constructor.js b/test/built-ins/Atomics/sub/not-a-constructor.js
new file mode 100644
index 0000000000..4d4b230de7
--- /dev/null
+++ b/test/built-ins/Atomics/sub/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.sub does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.sub), false, 'isConstructor(Atomics.sub) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.sub(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.sub(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/Atomics/xor/not-a-constructor.js b/test/built-ins/Atomics/xor/not-a-constructor.js
new file mode 100644
index 0000000000..94d855a042
--- /dev/null
+++ b/test/built-ins/Atomics/xor/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Atomics.xor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Atomics, arrow-function, TypedArray, SharedArrayBuffer]
+---*/
+
+assert.sameValue(isConstructor(Atomics.xor), false, 'isConstructor(Atomics.xor) must return false');
+
+assert.throws(TypeError, () => {
+  new Atomics.xor(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)));
+}, '`new Atomics.xor(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)))` throws TypeError');
+    
diff --git a/test/built-ins/BigInt/asIntN/not-a-constructor.js b/test/built-ins/BigInt/asIntN/not-a-constructor.js
new file mode 100644
index 0000000000..9e512c7774
--- /dev/null
+++ b/test/built-ins/BigInt/asIntN/not-a-constructor.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  BigInt.asIntN does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, arrow-function]
+---*/
+assert.sameValue(isConstructor(BigInt.asIntN), false, 'isConstructor(BigInt.asIntN) must return false');
+
+assert.throws(TypeError, () => {
+  new BigInt.asIntN(64, 1n);
+}, '`new BigInt.asIntN(64, 1n)` throws TypeError');
diff --git a/test/built-ins/BigInt/asUintN/not-a-constructor.js b/test/built-ins/BigInt/asUintN/not-a-constructor.js
new file mode 100644
index 0000000000..a7ee5ee24d
--- /dev/null
+++ b/test/built-ins/BigInt/asUintN/not-a-constructor.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  BigInt.asUintN does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, arrow-function]
+---*/
+assert.sameValue(isConstructor(BigInt.asUintN), false, 'isConstructor(BigInt.asUintN) must return false');
+
+assert.throws(TypeError, () => {
+  new BigInt.asUintN(64, 1n);
+}, '`new BigInt.asUintN(64, 1n)` throws TypeError');
diff --git a/test/built-ins/BigInt/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/BigInt/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..b47561b239
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  BigInt.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, arrow-function]
+---*/
+assert.sameValue(
+  isConstructor(BigInt.prototype.toLocaleString),
+  false,
+  'isConstructor(BigInt.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let n = 1n;
+  new n.toLocaleString();
+}, '`let n = 1n; new n.toLocaleString()` throws TypeError');
diff --git a/test/built-ins/BigInt/prototype/toString/not-a-constructor.js b/test/built-ins/BigInt/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..a69937a973
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/toString/not-a-constructor.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  BigInt.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, arrow-function]
+---*/
+assert.sameValue(
+  isConstructor(BigInt.prototype.toString),
+  false,
+  'isConstructor(BigInt.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let n = 1n;
+  new n.toString();
+}, '`let n = 1n; new n.toString()` throws TypeError');
diff --git a/test/built-ins/BigInt/prototype/valueOf/not-a-constructor.js b/test/built-ins/BigInt/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..a0d60101c6
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  BigInt.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, arrow-function]
+---*/
+assert.sameValue(
+  isConstructor(BigInt.prototype.valueOf),
+  false,
+  'isConstructor(BigInt.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let n = 1n;
+  new n.valueOf();
+}, '`let n = 1n; new n.valueOf()` throws TypeError');
diff --git a/test/built-ins/Boolean/prototype/toString/not-a-constructor.js b/test/built-ins/Boolean/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..2cee7e197f
--- /dev/null
+++ b/test/built-ins/Boolean/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Boolean.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Boolean.prototype.toString),
+  false,
+  'isConstructor(Boolean.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Boolean.prototype.toString();
+}, '`new Boolean.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Boolean/prototype/valueOf/not-a-constructor.js b/test/built-ins/Boolean/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..bf8afa305a
--- /dev/null
+++ b/test/built-ins/Boolean/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Boolean.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Boolean.prototype.valueOf),
+  false,
+  'isConstructor(Boolean.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Boolean.prototype.valueOf();
+}, '`new Boolean.prototype.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getBigInt64/not-a-constructor.js b/test/built-ins/DataView/prototype/getBigInt64/not-a-constructor.js
new file mode 100644
index 0000000000..e58d8fd865
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getBigInt64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getBigInt64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getBigInt64),
+  false,
+  'isConstructor(DataView.prototype.getBigInt64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getBigInt64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getBigInt64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getBigUint64/not-a-constructor.js b/test/built-ins/DataView/prototype/getBigUint64/not-a-constructor.js
new file mode 100644
index 0000000000..60cf4f7d5e
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getBigUint64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getBigUint64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getBigUint64),
+  false,
+  'isConstructor(DataView.prototype.getBigUint64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getBigUint64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getBigUint64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getFloat32/not-a-constructor.js b/test/built-ins/DataView/prototype/getFloat32/not-a-constructor.js
new file mode 100644
index 0000000000..0967866711
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getFloat32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getFloat32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getFloat32),
+  false,
+  'isConstructor(DataView.prototype.getFloat32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getFloat32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getFloat32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getFloat64/not-a-constructor.js b/test/built-ins/DataView/prototype/getFloat64/not-a-constructor.js
new file mode 100644
index 0000000000..452fadb946
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getFloat64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getFloat64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getFloat64),
+  false,
+  'isConstructor(DataView.prototype.getFloat64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getFloat64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getFloat64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getInt16/not-a-constructor.js b/test/built-ins/DataView/prototype/getInt16/not-a-constructor.js
new file mode 100644
index 0000000000..f4c449811e
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getInt16/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getInt16 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getInt16),
+  false,
+  'isConstructor(DataView.prototype.getInt16) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getInt16(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getInt16(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getInt32/not-a-constructor.js b/test/built-ins/DataView/prototype/getInt32/not-a-constructor.js
new file mode 100644
index 0000000000..0f2fe1e9c0
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getInt32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getInt32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getInt32),
+  false,
+  'isConstructor(DataView.prototype.getInt32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getInt32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getInt32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getInt8/not-a-constructor.js b/test/built-ins/DataView/prototype/getInt8/not-a-constructor.js
new file mode 100644
index 0000000000..0566b5398f
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getInt8/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getInt8 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getInt8),
+  false,
+  'isConstructor(DataView.prototype.getInt8) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getInt8(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getInt8(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getUint16/not-a-constructor.js b/test/built-ins/DataView/prototype/getUint16/not-a-constructor.js
new file mode 100644
index 0000000000..a88685e64f
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getUint16/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getUint16 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getUint16),
+  false,
+  'isConstructor(DataView.prototype.getUint16) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getUint16(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getUint16(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getUint32/not-a-constructor.js b/test/built-ins/DataView/prototype/getUint32/not-a-constructor.js
new file mode 100644
index 0000000000..ec5949be64
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getUint32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getUint32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getUint32),
+  false,
+  'isConstructor(DataView.prototype.getUint32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getUint32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getUint32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/getUint8/not-a-constructor.js b/test/built-ins/DataView/prototype/getUint8/not-a-constructor.js
new file mode 100644
index 0000000000..52f9673a30
--- /dev/null
+++ b/test/built-ins/DataView/prototype/getUint8/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.getUint8 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.getUint8),
+  false,
+  'isConstructor(DataView.prototype.getUint8) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.getUint8(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.getUint8(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setBigInt64/not-a-constructor.js b/test/built-ins/DataView/prototype/setBigInt64/not-a-constructor.js
new file mode 100644
index 0000000000..d1f1d70090
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setBigInt64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setBigInt64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, BigInt, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setBigInt64),
+  false,
+  'isConstructor(DataView.prototype.setBigInt64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setBigInt64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setBigInt64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setBigUint64/not-a-constructor.js b/test/built-ins/DataView/prototype/setBigUint64/not-a-constructor.js
new file mode 100644
index 0000000000..d1951096e1
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setBigUint64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setBigUint64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setBigUint64),
+  false,
+  'isConstructor(DataView.prototype.setBigUint64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setBigUint64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setBigUint64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setFloat32/not-a-constructor.js b/test/built-ins/DataView/prototype/setFloat32/not-a-constructor.js
new file mode 100644
index 0000000000..c1465a2fa3
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setFloat32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setFloat32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setFloat32),
+  false,
+  'isConstructor(DataView.prototype.setFloat32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setFloat32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setFloat32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setFloat64/not-a-constructor.js b/test/built-ins/DataView/prototype/setFloat64/not-a-constructor.js
new file mode 100644
index 0000000000..4d6f0e3c91
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setFloat64/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setFloat64 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setFloat64),
+  false,
+  'isConstructor(DataView.prototype.setFloat64) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setFloat64(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setFloat64(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setInt16/not-a-constructor.js b/test/built-ins/DataView/prototype/setInt16/not-a-constructor.js
new file mode 100644
index 0000000000..135f34cc90
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setInt16/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setInt16 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setInt16),
+  false,
+  'isConstructor(DataView.prototype.setInt16) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setInt16(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setInt16(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setInt32/not-a-constructor.js b/test/built-ins/DataView/prototype/setInt32/not-a-constructor.js
new file mode 100644
index 0000000000..628a76867c
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setInt32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setInt32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setInt32),
+  false,
+  'isConstructor(DataView.prototype.setInt32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setInt32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setInt32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setInt8/not-a-constructor.js b/test/built-ins/DataView/prototype/setInt8/not-a-constructor.js
new file mode 100644
index 0000000000..3287f50d77
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setInt8/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setInt8 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setInt8),
+  false,
+  'isConstructor(DataView.prototype.setInt8) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setInt8(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setInt8(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setUint16/not-a-constructor.js b/test/built-ins/DataView/prototype/setUint16/not-a-constructor.js
new file mode 100644
index 0000000000..62f8cb0981
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setUint16/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setUint16 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setUint16),
+  false,
+  'isConstructor(DataView.prototype.setUint16) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setUint16(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setUint16(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setUint32/not-a-constructor.js b/test/built-ins/DataView/prototype/setUint32/not-a-constructor.js
new file mode 100644
index 0000000000..89d5998756
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setUint32/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setUint32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setUint32),
+  false,
+  'isConstructor(DataView.prototype.setUint32) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setUint32(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setUint32(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/DataView/prototype/setUint8/not-a-constructor.js b/test/built-ins/DataView/prototype/setUint8/not-a-constructor.js
new file mode 100644
index 0000000000..2eb4521315
--- /dev/null
+++ b/test/built-ins/DataView/prototype/setUint8/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  DataView.prototype.setUint8 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, DataView, arrow-function, ArrayBuffer]
+---*/
+
+assert.sameValue(
+  isConstructor(DataView.prototype.setUint8),
+  false,
+  'isConstructor(DataView.prototype.setUint8) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let dv = new DataView(new ArrayBuffer(16)); new dv.setUint8(0, 0);
+}, '`let dv = new DataView(new ArrayBuffer(16)); new dv.setUint8(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/Date/UTC/not-a-constructor.js b/test/built-ins/Date/UTC/not-a-constructor.js
new file mode 100644
index 0000000000..64607b32dd
--- /dev/null
+++ b/test/built-ins/Date/UTC/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.UTC does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Date.UTC), false, 'isConstructor(Date.UTC) must return false');
+
+assert.throws(TypeError, () => {
+  new Date.UTC();
+}, '`new Date.UTC()` throws TypeError');
+    
diff --git a/test/built-ins/Date/now/not-a-constructor.js b/test/built-ins/Date/now/not-a-constructor.js
new file mode 100644
index 0000000000..5522787de0
--- /dev/null
+++ b/test/built-ins/Date/now/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.now does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Date.now), false, 'isConstructor(Date.now) must return false');
+
+assert.throws(TypeError, () => {
+  new Date.now();
+}, '`new Date.now()` throws TypeError');
+    
diff --git a/test/built-ins/Date/parse/not-a-constructor.js b/test/built-ins/Date/parse/not-a-constructor.js
new file mode 100644
index 0000000000..e4a745b944
--- /dev/null
+++ b/test/built-ins/Date/parse/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.parse does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Date.parse), false, 'isConstructor(Date.parse) must return false');
+
+assert.throws(TypeError, () => {
+  new Date.parse();
+}, '`new Date.parse()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getDate/not-a-constructor.js b/test/built-ins/Date/prototype/getDate/not-a-constructor.js
new file mode 100644
index 0000000000..708f3f1887
--- /dev/null
+++ b/test/built-ins/Date/prototype/getDate/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getDate does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getDate),
+  false,
+  'isConstructor(Date.prototype.getDate) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getDate();
+}, '`let date = new Date(Date.now()); new date.getDate()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getDay/not-a-constructor.js b/test/built-ins/Date/prototype/getDay/not-a-constructor.js
new file mode 100644
index 0000000000..0b53733b99
--- /dev/null
+++ b/test/built-ins/Date/prototype/getDay/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getDay does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getDay),
+  false,
+  'isConstructor(Date.prototype.getDay) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getDay();
+}, '`let date = new Date(Date.now()); new date.getDay()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getFullYear/not-a-constructor.js b/test/built-ins/Date/prototype/getFullYear/not-a-constructor.js
new file mode 100644
index 0000000000..0e187cdfc4
--- /dev/null
+++ b/test/built-ins/Date/prototype/getFullYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getFullYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getFullYear),
+  false,
+  'isConstructor(Date.prototype.getFullYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getFullYear();
+}, '`let date = new Date(Date.now()); new date.getFullYear()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getHours/not-a-constructor.js b/test/built-ins/Date/prototype/getHours/not-a-constructor.js
new file mode 100644
index 0000000000..64ef731bf0
--- /dev/null
+++ b/test/built-ins/Date/prototype/getHours/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getHours does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getHours),
+  false,
+  'isConstructor(Date.prototype.getHours) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getHours();
+}, '`let date = new Date(Date.now()); new date.getHours()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getMilliseconds/not-a-constructor.js b/test/built-ins/Date/prototype/getMilliseconds/not-a-constructor.js
new file mode 100644
index 0000000000..4de4763d30
--- /dev/null
+++ b/test/built-ins/Date/prototype/getMilliseconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getMilliseconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getMilliseconds),
+  false,
+  'isConstructor(Date.prototype.getMilliseconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getMilliseconds();
+}, '`let date = new Date(Date.now()); new date.getMilliseconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getMinutes/not-a-constructor.js b/test/built-ins/Date/prototype/getMinutes/not-a-constructor.js
new file mode 100644
index 0000000000..7d8d83c010
--- /dev/null
+++ b/test/built-ins/Date/prototype/getMinutes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getMinutes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getMinutes),
+  false,
+  'isConstructor(Date.prototype.getMinutes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getMinutes();
+}, '`let date = new Date(Date.now()); new date.getMinutes()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getMonth/not-a-constructor.js b/test/built-ins/Date/prototype/getMonth/not-a-constructor.js
new file mode 100644
index 0000000000..f8fa89cc63
--- /dev/null
+++ b/test/built-ins/Date/prototype/getMonth/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getMonth does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getMonth),
+  false,
+  'isConstructor(Date.prototype.getMonth) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getMonth();
+}, '`let date = new Date(Date.now()); new date.getMonth()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getSeconds/not-a-constructor.js b/test/built-ins/Date/prototype/getSeconds/not-a-constructor.js
new file mode 100644
index 0000000000..56e69dd215
--- /dev/null
+++ b/test/built-ins/Date/prototype/getSeconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getSeconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getSeconds),
+  false,
+  'isConstructor(Date.prototype.getSeconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getSeconds();
+}, '`let date = new Date(Date.now()); new date.getSeconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getTime/not-a-constructor.js b/test/built-ins/Date/prototype/getTime/not-a-constructor.js
new file mode 100644
index 0000000000..4b766f0abb
--- /dev/null
+++ b/test/built-ins/Date/prototype/getTime/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getTime does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getTime),
+  false,
+  'isConstructor(Date.prototype.getTime) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getTime();
+}, '`let date = new Date(Date.now()); new date.getTime()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getTimezoneOffset/not-a-constructor.js b/test/built-ins/Date/prototype/getTimezoneOffset/not-a-constructor.js
new file mode 100644
index 0000000000..2af2324a25
--- /dev/null
+++ b/test/built-ins/Date/prototype/getTimezoneOffset/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getTimezoneOffset does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getTimezoneOffset),
+  false,
+  'isConstructor(Date.prototype.getTimezoneOffset) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getTimezoneOffset();
+}, '`let date = new Date(Date.now()); new date.getTimezoneOffset()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCDate/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCDate/not-a-constructor.js
new file mode 100644
index 0000000000..612fab529f
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCDate/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCDate does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCDate),
+  false,
+  'isConstructor(Date.prototype.getUTCDate) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCDate();
+}, '`let date = new Date(Date.now()); new date.getUTCDate()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCDay/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCDay/not-a-constructor.js
new file mode 100644
index 0000000000..913698db63
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCDay/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCDay does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCDay),
+  false,
+  'isConstructor(Date.prototype.getUTCDay) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCDay();
+}, '`let date = new Date(Date.now()); new date.getUTCDay()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCFullYear/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCFullYear/not-a-constructor.js
new file mode 100644
index 0000000000..23eb08efdd
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCFullYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCFullYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCFullYear),
+  false,
+  'isConstructor(Date.prototype.getUTCFullYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCFullYear();
+}, '`let date = new Date(Date.now()); new date.getUTCFullYear()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCHours/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCHours/not-a-constructor.js
new file mode 100644
index 0000000000..c75a084100
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCHours/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCHours does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCHours),
+  false,
+  'isConstructor(Date.prototype.getUTCHours) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCHours();
+}, '`let date = new Date(Date.now()); new date.getUTCHours()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCMilliseconds/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCMilliseconds/not-a-constructor.js
new file mode 100644
index 0000000000..3a26721db8
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCMilliseconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCMilliseconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCMilliseconds),
+  false,
+  'isConstructor(Date.prototype.getUTCMilliseconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCMilliseconds();
+}, '`let date = new Date(Date.now()); new date.getUTCMilliseconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCMinutes/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCMinutes/not-a-constructor.js
new file mode 100644
index 0000000000..60f2adc1a5
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCMinutes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCMinutes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCMinutes),
+  false,
+  'isConstructor(Date.prototype.getUTCMinutes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCMinutes();
+}, '`let date = new Date(Date.now()); new date.getUTCMinutes()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCMonth/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCMonth/not-a-constructor.js
new file mode 100644
index 0000000000..231bd72e7b
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCMonth/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCMonth does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCMonth),
+  false,
+  'isConstructor(Date.prototype.getUTCMonth) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCMonth();
+}, '`let date = new Date(Date.now()); new date.getUTCMonth()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/getUTCSeconds/not-a-constructor.js b/test/built-ins/Date/prototype/getUTCSeconds/not-a-constructor.js
new file mode 100644
index 0000000000..228c2d8ca0
--- /dev/null
+++ b/test/built-ins/Date/prototype/getUTCSeconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.getUTCSeconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.getUTCSeconds),
+  false,
+  'isConstructor(Date.prototype.getUTCSeconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.getUTCSeconds();
+}, '`let date = new Date(Date.now()); new date.getUTCSeconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setDate/not-a-constructor.js b/test/built-ins/Date/prototype/setDate/not-a-constructor.js
new file mode 100644
index 0000000000..41867ef705
--- /dev/null
+++ b/test/built-ins/Date/prototype/setDate/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setDate does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setDate),
+  false,
+  'isConstructor(Date.prototype.setDate) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setDate();
+}, '`let date = new Date(Date.now()); new date.setDate()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setFullYear/not-a-constructor.js b/test/built-ins/Date/prototype/setFullYear/not-a-constructor.js
new file mode 100644
index 0000000000..7c31771f60
--- /dev/null
+++ b/test/built-ins/Date/prototype/setFullYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setFullYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setFullYear),
+  false,
+  'isConstructor(Date.prototype.setFullYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setFullYear();
+}, '`let date = new Date(Date.now()); new date.setFullYear()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setHours/not-a-constructor.js b/test/built-ins/Date/prototype/setHours/not-a-constructor.js
new file mode 100644
index 0000000000..e8f1269105
--- /dev/null
+++ b/test/built-ins/Date/prototype/setHours/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setHours does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setHours),
+  false,
+  'isConstructor(Date.prototype.setHours) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setHours();
+}, '`let date = new Date(Date.now()); new date.setHours()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setMilliseconds/not-a-constructor.js b/test/built-ins/Date/prototype/setMilliseconds/not-a-constructor.js
new file mode 100644
index 0000000000..f365428f97
--- /dev/null
+++ b/test/built-ins/Date/prototype/setMilliseconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setMilliseconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setMilliseconds),
+  false,
+  'isConstructor(Date.prototype.setMilliseconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setMilliseconds();
+}, '`let date = new Date(Date.now()); new date.setMilliseconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setMinutes/not-a-constructor.js b/test/built-ins/Date/prototype/setMinutes/not-a-constructor.js
new file mode 100644
index 0000000000..1dac219e49
--- /dev/null
+++ b/test/built-ins/Date/prototype/setMinutes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setMinutes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setMinutes),
+  false,
+  'isConstructor(Date.prototype.setMinutes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setMinutes();
+}, '`let date = new Date(Date.now()); new date.setMinutes()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setMonth/not-a-constructor.js b/test/built-ins/Date/prototype/setMonth/not-a-constructor.js
new file mode 100644
index 0000000000..843fa2d624
--- /dev/null
+++ b/test/built-ins/Date/prototype/setMonth/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setMonth does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setMonth),
+  false,
+  'isConstructor(Date.prototype.setMonth) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setMonth();
+}, '`let date = new Date(Date.now()); new date.setMonth()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setSeconds/not-a-constructor.js b/test/built-ins/Date/prototype/setSeconds/not-a-constructor.js
new file mode 100644
index 0000000000..69e6d12223
--- /dev/null
+++ b/test/built-ins/Date/prototype/setSeconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setSeconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setSeconds),
+  false,
+  'isConstructor(Date.prototype.setSeconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setSeconds();
+}, '`let date = new Date(Date.now()); new date.setSeconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setTime/not-a-constructor.js b/test/built-ins/Date/prototype/setTime/not-a-constructor.js
new file mode 100644
index 0000000000..9c881ea8d4
--- /dev/null
+++ b/test/built-ins/Date/prototype/setTime/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setTime does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setTime),
+  false,
+  'isConstructor(Date.prototype.setTime) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setTime();
+}, '`let date = new Date(Date.now()); new date.setTime()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCDate/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCDate/not-a-constructor.js
new file mode 100644
index 0000000000..1bce4c055d
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCDate/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCDate does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCDate),
+  false,
+  'isConstructor(Date.prototype.setUTCDate) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCDate();
+}, '`let date = new Date(Date.now()); new date.setUTCDate()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCFullYear/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCFullYear/not-a-constructor.js
new file mode 100644
index 0000000000..84653851bb
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCFullYear/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCFullYear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCFullYear),
+  false,
+  'isConstructor(Date.prototype.setUTCFullYear) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCFullYear();
+}, '`let date = new Date(Date.now()); new date.setUTCFullYear()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCHours/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCHours/not-a-constructor.js
new file mode 100644
index 0000000000..b90cbd484d
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCHours/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCHours does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCHours),
+  false,
+  'isConstructor(Date.prototype.setUTCHours) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCHours();
+}, '`let date = new Date(Date.now()); new date.setUTCHours()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCMilliseconds/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCMilliseconds/not-a-constructor.js
new file mode 100644
index 0000000000..b4dbc75c02
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCMilliseconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCMilliseconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCMilliseconds),
+  false,
+  'isConstructor(Date.prototype.setUTCMilliseconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCMilliseconds();
+}, '`let date = new Date(Date.now()); new date.setUTCMilliseconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCMinutes/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCMinutes/not-a-constructor.js
new file mode 100644
index 0000000000..0647118890
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCMinutes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCMinutes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCMinutes),
+  false,
+  'isConstructor(Date.prototype.setUTCMinutes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCMinutes();
+}, '`let date = new Date(Date.now()); new date.setUTCMinutes()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCMonth/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCMonth/not-a-constructor.js
new file mode 100644
index 0000000000..d5a455ed2a
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCMonth/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCMonth does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCMonth),
+  false,
+  'isConstructor(Date.prototype.setUTCMonth) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCMonth();
+}, '`let date = new Date(Date.now()); new date.setUTCMonth()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/setUTCSeconds/not-a-constructor.js b/test/built-ins/Date/prototype/setUTCSeconds/not-a-constructor.js
new file mode 100644
index 0000000000..13a7507233
--- /dev/null
+++ b/test/built-ins/Date/prototype/setUTCSeconds/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.setUTCSeconds does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.setUTCSeconds),
+  false,
+  'isConstructor(Date.prototype.setUTCSeconds) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.setUTCSeconds();
+}, '`let date = new Date(Date.now()); new date.setUTCSeconds()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toDateString/not-a-constructor.js b/test/built-ins/Date/prototype/toDateString/not-a-constructor.js
new file mode 100644
index 0000000000..6320f29698
--- /dev/null
+++ b/test/built-ins/Date/prototype/toDateString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toDateString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toDateString),
+  false,
+  'isConstructor(Date.prototype.toDateString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toDateString();
+}, '`let date = new Date(Date.now()); new date.toDateString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toISOString/not-a-constructor.js b/test/built-ins/Date/prototype/toISOString/not-a-constructor.js
new file mode 100644
index 0000000000..8df5305915
--- /dev/null
+++ b/test/built-ins/Date/prototype/toISOString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toISOString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toISOString),
+  false,
+  'isConstructor(Date.prototype.toISOString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toISOString();
+}, '`let date = new Date(Date.now()); new date.toISOString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toJSON/not-a-constructor.js b/test/built-ins/Date/prototype/toJSON/not-a-constructor.js
new file mode 100644
index 0000000000..b06b229456
--- /dev/null
+++ b/test/built-ins/Date/prototype/toJSON/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toJSON does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toJSON),
+  false,
+  'isConstructor(Date.prototype.toJSON) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toJSON();
+}, '`let date = new Date(Date.now()); new date.toJSON()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toLocaleDateString/not-a-constructor.js b/test/built-ins/Date/prototype/toLocaleDateString/not-a-constructor.js
new file mode 100644
index 0000000000..d4bf9a3e9e
--- /dev/null
+++ b/test/built-ins/Date/prototype/toLocaleDateString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toLocaleDateString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toLocaleDateString),
+  false,
+  'isConstructor(Date.prototype.toLocaleDateString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toLocaleDateString();
+}, '`let date = new Date(Date.now()); new date.toLocaleDateString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/Date/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..067b0e752c
--- /dev/null
+++ b/test/built-ins/Date/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toLocaleString),
+  false,
+  'isConstructor(Date.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toLocaleString();
+}, '`let date = new Date(Date.now()); new date.toLocaleString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toLocaleTimeString/not-a-constructor.js b/test/built-ins/Date/prototype/toLocaleTimeString/not-a-constructor.js
new file mode 100644
index 0000000000..c2c7586fc9
--- /dev/null
+++ b/test/built-ins/Date/prototype/toLocaleTimeString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toLocaleTimeString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toLocaleTimeString),
+  false,
+  'isConstructor(Date.prototype.toLocaleTimeString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toLocaleTimeString();
+}, '`let date = new Date(Date.now()); new date.toLocaleTimeString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toString/not-a-constructor.js b/test/built-ins/Date/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..bb4fdb252c
--- /dev/null
+++ b/test/built-ins/Date/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toString),
+  false,
+  'isConstructor(Date.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toString();
+}, '`let date = new Date(Date.now()); new date.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toTimeString/not-a-constructor.js b/test/built-ins/Date/prototype/toTimeString/not-a-constructor.js
new file mode 100644
index 0000000000..982f5e3904
--- /dev/null
+++ b/test/built-ins/Date/prototype/toTimeString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toTimeString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toTimeString),
+  false,
+  'isConstructor(Date.prototype.toTimeString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toTimeString();
+}, '`let date = new Date(Date.now()); new date.toTimeString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/toUTCString/not-a-constructor.js b/test/built-ins/Date/prototype/toUTCString/not-a-constructor.js
new file mode 100644
index 0000000000..5d73d2d667
--- /dev/null
+++ b/test/built-ins/Date/prototype/toUTCString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.toUTCString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.toUTCString),
+  false,
+  'isConstructor(Date.prototype.toUTCString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.toUTCString();
+}, '`let date = new Date(Date.now()); new date.toUTCString()` throws TypeError');
+    
diff --git a/test/built-ins/Date/prototype/valueOf/not-a-constructor.js b/test/built-ins/Date/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..75402d9350
--- /dev/null
+++ b/test/built-ins/Date/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Date.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Date.prototype.valueOf),
+  false,
+  'isConstructor(Date.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let date = new Date(Date.now()); new date.valueOf();
+}, '`let date = new Date(Date.now()); new date.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/Error/prototype/toString/not-a-constructor.js b/test/built-ins/Error/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..759bcba8c5
--- /dev/null
+++ b/test/built-ins/Error/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Error.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Error.prototype.toString),
+  false,
+  'isConstructor(Error.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Error.prototype.toString();
+}, '`new Error.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/FinalizationRegistry/prototype/cleanupSome/not-a-constructor.js b/test/built-ins/FinalizationRegistry/prototype/cleanupSome/not-a-constructor.js
new file mode 100644
index 0000000000..c0153f1dda
--- /dev/null
+++ b/test/built-ins/FinalizationRegistry/prototype/cleanupSome/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  FinalizationRegistry.prototype.cleanupSome does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, FinalizationRegistry, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(FinalizationRegistry.prototype.cleanupSome),
+  false,
+  'isConstructor(FinalizationRegistry.prototype.cleanupSome) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let fr = new FinalizationRegistry(() => {}); new fr.cleanupSome(() => {});
+}, '`let fr = new FinalizationRegistry(() => {}); new fr.cleanupSome(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/FinalizationRegistry/prototype/register/not-a-constructor.js b/test/built-ins/FinalizationRegistry/prototype/register/not-a-constructor.js
new file mode 100644
index 0000000000..357248e1b0
--- /dev/null
+++ b/test/built-ins/FinalizationRegistry/prototype/register/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  FinalizationRegistry.prototype.register does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, FinalizationRegistry, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(FinalizationRegistry.prototype.register),
+  false,
+  'isConstructor(FinalizationRegistry.prototype.register) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let fr = new FinalizationRegistry(() => {}); new fr.register({});
+}, '`let fr = new FinalizationRegistry(() => {}); new fr.register({})` throws TypeError');
+    
diff --git a/test/built-ins/FinalizationRegistry/prototype/unregister/not-a-constructor.js b/test/built-ins/FinalizationRegistry/prototype/unregister/not-a-constructor.js
new file mode 100644
index 0000000000..29883694f2
--- /dev/null
+++ b/test/built-ins/FinalizationRegistry/prototype/unregister/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  FinalizationRegistry.prototype.unregister does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, FinalizationRegistry, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(FinalizationRegistry.prototype.unregister),
+  false,
+  'isConstructor(FinalizationRegistry.prototype.unregister) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let fr = new FinalizationRegistry(() => {}); let token = {}; fr.register(token); new fr.unregister(token);
+}, '`let fr = new FinalizationRegistry(() => {}); let token = {}; fr.register(token); new fr.unregister(token)` throws TypeError');
+    
diff --git a/test/built-ins/Function/prototype/apply/not-a-constructor.js b/test/built-ins/Function/prototype/apply/not-a-constructor.js
new file mode 100644
index 0000000000..1ea7ee265f
--- /dev/null
+++ b/test/built-ins/Function/prototype/apply/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Function.prototype.apply does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Function.prototype.apply),
+  false,
+  'isConstructor(Function.prototype.apply) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Function.prototype.apply();
+}, '`new Function.prototype.apply()` throws TypeError');
+    
diff --git a/test/built-ins/Function/prototype/bind/not-a-constructor.js b/test/built-ins/Function/prototype/bind/not-a-constructor.js
new file mode 100644
index 0000000000..880e23cd2a
--- /dev/null
+++ b/test/built-ins/Function/prototype/bind/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Function.prototype.bind does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Function.prototype.bind),
+  false,
+  'isConstructor(Function.prototype.bind) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Function.prototype.bind();
+}, '`new Function.prototype.bind()` throws TypeError');
+    
diff --git a/test/built-ins/Function/prototype/call/not-a-constructor.js b/test/built-ins/Function/prototype/call/not-a-constructor.js
new file mode 100644
index 0000000000..82b1f87af1
--- /dev/null
+++ b/test/built-ins/Function/prototype/call/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Function.prototype.call does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Function.prototype.call),
+  false,
+  'isConstructor(Function.prototype.call) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Function.prototype.call();
+}, '`new Function.prototype.call()` throws TypeError');
+    
diff --git a/test/built-ins/Function/prototype/toString/not-a-constructor.js b/test/built-ins/Function/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..7257bf46da
--- /dev/null
+++ b/test/built-ins/Function/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Function.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Function.prototype.toString),
+  false,
+  'isConstructor(Function.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Function.prototype.toString();
+}, '`new Function.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/GeneratorPrototype/next/not-a-constructor.js b/test/built-ins/GeneratorPrototype/next/not-a-constructor.js
new file mode 100644
index 0000000000..7130a01db2
--- /dev/null
+++ b/test/built-ins/GeneratorPrototype/next/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getPrototypeOf((function* g() {}).prototype).next does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, generators, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getPrototypeOf((function* g() {}).prototype).next),
+  false,
+  'isConstructor(Object.getPrototypeOf((function* g() {}).prototype).next) must return false'
+);
+
+assert.throws(TypeError, () => {
+  function* g() {} let iterator = g(); new iterator.next();
+}, '`function* g() {} let iterator = g(); new iterator.next()` throws TypeError');
+    
diff --git a/test/built-ins/GeneratorPrototype/return/not-a-constructor.js b/test/built-ins/GeneratorPrototype/return/not-a-constructor.js
new file mode 100644
index 0000000000..7ebbd948a8
--- /dev/null
+++ b/test/built-ins/GeneratorPrototype/return/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getPrototypeOf((function* g() {}).prototype).return does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, generators, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getPrototypeOf((function* g() {}).prototype).return),
+  false,
+  'isConstructor(Object.getPrototypeOf((function* g() {}).prototype).return) must return false'
+);
+
+assert.throws(TypeError, () => {
+  function* g() {} let iterator = g(); new iterator.return();
+}, '`function* g() {} let iterator = g(); new iterator.return()` throws TypeError');
+    
diff --git a/test/built-ins/GeneratorPrototype/throw/not-a-constructor.js b/test/built-ins/GeneratorPrototype/throw/not-a-constructor.js
new file mode 100644
index 0000000000..a48a07151e
--- /dev/null
+++ b/test/built-ins/GeneratorPrototype/throw/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getPrototypeOf((function* g() {}).prototype).throw does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, generators, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getPrototypeOf((function* g() {}).prototype).throw),
+  false,
+  'isConstructor(Object.getPrototypeOf((function* g() {}).prototype).throw) must return false'
+);
+
+assert.throws(TypeError, () => {
+  function* g() {} let expected = new Test262Error(); let iterator = g();try {new iterator.throw(expected);} catch (e) {if (e !== expected) {throw e;}}
+}, '`function* g() {} let expected = new Test262Error(); let iterator = g();try {new iterator.throw(expected);} catch (e) {if (e !== expected) {throw e;}}` throws TypeError');
+    
diff --git a/test/built-ins/JSON/parse/not-a-constructor.js b/test/built-ins/JSON/parse/not-a-constructor.js
new file mode 100644
index 0000000000..a815cded6e
--- /dev/null
+++ b/test/built-ins/JSON/parse/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  JSON.parse does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(JSON.parse), false, 'isConstructor(JSON.parse) must return false');
+
+assert.throws(TypeError, () => {
+  new JSON.parse('{}');
+}, '`new JSON.parse(\'{}\')` throws TypeError');
+    
diff --git a/test/built-ins/JSON/stringify/not-a-constructor.js b/test/built-ins/JSON/stringify/not-a-constructor.js
new file mode 100644
index 0000000000..cd2294c6f4
--- /dev/null
+++ b/test/built-ins/JSON/stringify/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  JSON.stringify does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(JSON.stringify), false, 'isConstructor(JSON.stringify) must return false');
+
+assert.throws(TypeError, () => {
+  new JSON.stringify({});
+}, '`new JSON.stringify({})` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/Symbol.iterator/not-a-constructor.js b/test/built-ins/Map/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..a46d9fe1af
--- /dev/null
+++ b/test/built-ins/Map/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype[Symbol.iterator] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, Map, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Map.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(Map.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m[Symbol.iterator]();
+}, '`let m = new Map(); new m[Symbol.iterator]()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/clear/not-a-constructor.js b/test/built-ins/Map/prototype/clear/not-a-constructor.js
new file mode 100644
index 0000000000..8649892500
--- /dev/null
+++ b/test/built-ins/Map/prototype/clear/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.clear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.clear), false, 'isConstructor(Map.prototype.clear) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.clear();
+}, '`let m = new Map(); new m.clear()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/delete/not-a-constructor.js b/test/built-ins/Map/prototype/delete/not-a-constructor.js
new file mode 100644
index 0000000000..7c804d71e7
--- /dev/null
+++ b/test/built-ins/Map/prototype/delete/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.delete does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.delete), false, 'isConstructor(Map.prototype.delete) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.delete();
+}, '`let m = new Map(); new m.delete()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/entries/not-a-constructor.js b/test/built-ins/Map/prototype/entries/not-a-constructor.js
new file mode 100644
index 0000000000..e2824cea2e
--- /dev/null
+++ b/test/built-ins/Map/prototype/entries/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.entries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Map.prototype.entries),
+  false,
+  'isConstructor(Map.prototype.entries) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.entries();
+}, '`let m = new Map(); new m.entries()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/forEach/not-a-constructor.js b/test/built-ins/Map/prototype/forEach/not-a-constructor.js
new file mode 100644
index 0000000000..beeb01363b
--- /dev/null
+++ b/test/built-ins/Map/prototype/forEach/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.forEach does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Map.prototype.forEach),
+  false,
+  'isConstructor(Map.prototype.forEach) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.forEach();
+}, '`let m = new Map(); new m.forEach()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/get/not-a-constructor.js b/test/built-ins/Map/prototype/get/not-a-constructor.js
new file mode 100644
index 0000000000..e2b6e2471e
--- /dev/null
+++ b/test/built-ins/Map/prototype/get/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.get does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.get), false, 'isConstructor(Map.prototype.get) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.get();
+}, '`let m = new Map(); new m.get()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/has/not-a-constructor.js b/test/built-ins/Map/prototype/has/not-a-constructor.js
new file mode 100644
index 0000000000..3338db48af
--- /dev/null
+++ b/test/built-ins/Map/prototype/has/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.has does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.has), false, 'isConstructor(Map.prototype.has) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.has();
+}, '`let m = new Map(); new m.has()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/keys/not-a-constructor.js b/test/built-ins/Map/prototype/keys/not-a-constructor.js
new file mode 100644
index 0000000000..9d84207e33
--- /dev/null
+++ b/test/built-ins/Map/prototype/keys/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.keys does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.keys), false, 'isConstructor(Map.prototype.keys) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.keys();
+}, '`let m = new Map(); new m.keys()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/set/not-a-constructor.js b/test/built-ins/Map/prototype/set/not-a-constructor.js
new file mode 100644
index 0000000000..3997fda7da
--- /dev/null
+++ b/test/built-ins/Map/prototype/set/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.set does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.set), false, 'isConstructor(Map.prototype.set) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.set();
+}, '`let m = new Map(); new m.set()` throws TypeError');
+    
diff --git a/test/built-ins/Map/prototype/values/not-a-constructor.js b/test/built-ins/Map/prototype/values/not-a-constructor.js
new file mode 100644
index 0000000000..547008e405
--- /dev/null
+++ b/test/built-ins/Map/prototype/values/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Map.prototype.values does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Map, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Map.prototype.values), false, 'isConstructor(Map.prototype.values) must return false');
+
+assert.throws(TypeError, () => {
+  let m = new Map(); new m.values();
+}, '`let m = new Map(); new m.values()` throws TypeError');
+    
diff --git a/test/built-ins/Math/abs/not-a-constructor.js b/test/built-ins/Math/abs/not-a-constructor.js
new file mode 100644
index 0000000000..821a976491
--- /dev/null
+++ b/test/built-ins/Math/abs/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.abs does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.abs), false, 'isConstructor(Math.abs) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.abs();
+}, '`new Math.abs()` throws TypeError');
+    
diff --git a/test/built-ins/Math/acos/not-a-constructor.js b/test/built-ins/Math/acos/not-a-constructor.js
new file mode 100644
index 0000000000..7632a4261b
--- /dev/null
+++ b/test/built-ins/Math/acos/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.acos does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.acos), false, 'isConstructor(Math.acos) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.acos();
+}, '`new Math.acos()` throws TypeError');
+    
diff --git a/test/built-ins/Math/acosh/not-a-constructor.js b/test/built-ins/Math/acosh/not-a-constructor.js
new file mode 100644
index 0000000000..da6c7b7a91
--- /dev/null
+++ b/test/built-ins/Math/acosh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.acosh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.acosh), false, 'isConstructor(Math.acosh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.acosh();
+}, '`new Math.acosh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/asin/not-a-constructor.js b/test/built-ins/Math/asin/not-a-constructor.js
new file mode 100644
index 0000000000..86f41330fb
--- /dev/null
+++ b/test/built-ins/Math/asin/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.asin does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.asin), false, 'isConstructor(Math.asin) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.asin();
+}, '`new Math.asin()` throws TypeError');
+    
diff --git a/test/built-ins/Math/asinh/not-a-constructor.js b/test/built-ins/Math/asinh/not-a-constructor.js
new file mode 100644
index 0000000000..e8c6be7bfc
--- /dev/null
+++ b/test/built-ins/Math/asinh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.asinh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.asinh), false, 'isConstructor(Math.asinh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.asinh();
+}, '`new Math.asinh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/atan/not-a-constructor.js b/test/built-ins/Math/atan/not-a-constructor.js
new file mode 100644
index 0000000000..79e508eeaf
--- /dev/null
+++ b/test/built-ins/Math/atan/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.atan does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.atan), false, 'isConstructor(Math.atan) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.atan();
+}, '`new Math.atan()` throws TypeError');
+    
diff --git a/test/built-ins/Math/atan2/not-a-constructor.js b/test/built-ins/Math/atan2/not-a-constructor.js
new file mode 100644
index 0000000000..8a70d3a3c3
--- /dev/null
+++ b/test/built-ins/Math/atan2/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.atan2 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.atan2), false, 'isConstructor(Math.atan2) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.atan2();
+}, '`new Math.atan2()` throws TypeError');
+    
diff --git a/test/built-ins/Math/atanh/not-a-constructor.js b/test/built-ins/Math/atanh/not-a-constructor.js
new file mode 100644
index 0000000000..3453a851f0
--- /dev/null
+++ b/test/built-ins/Math/atanh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.atanh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.atanh), false, 'isConstructor(Math.atanh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.atanh();
+}, '`new Math.atanh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/cbrt/not-a-constructor.js b/test/built-ins/Math/cbrt/not-a-constructor.js
new file mode 100644
index 0000000000..7f989bd79b
--- /dev/null
+++ b/test/built-ins/Math/cbrt/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.cbrt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.cbrt), false, 'isConstructor(Math.cbrt) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.cbrt();
+}, '`new Math.cbrt()` throws TypeError');
+    
diff --git a/test/built-ins/Math/ceil/not-a-constructor.js b/test/built-ins/Math/ceil/not-a-constructor.js
new file mode 100644
index 0000000000..06fe934984
--- /dev/null
+++ b/test/built-ins/Math/ceil/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.ceil does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.ceil), false, 'isConstructor(Math.ceil) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.ceil();
+}, '`new Math.ceil()` throws TypeError');
+    
diff --git a/test/built-ins/Math/clz32/not-a-constructor.js b/test/built-ins/Math/clz32/not-a-constructor.js
new file mode 100644
index 0000000000..69bb0dedd9
--- /dev/null
+++ b/test/built-ins/Math/clz32/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.clz32 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.clz32), false, 'isConstructor(Math.clz32) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.clz32();
+}, '`new Math.clz32()` throws TypeError');
+    
diff --git a/test/built-ins/Math/cos/not-a-constructor.js b/test/built-ins/Math/cos/not-a-constructor.js
new file mode 100644
index 0000000000..4fc4400f77
--- /dev/null
+++ b/test/built-ins/Math/cos/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.cos does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.cos), false, 'isConstructor(Math.cos) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.cos();
+}, '`new Math.cos()` throws TypeError');
+    
diff --git a/test/built-ins/Math/cosh/not-a-constructor.js b/test/built-ins/Math/cosh/not-a-constructor.js
new file mode 100644
index 0000000000..94c919f2dc
--- /dev/null
+++ b/test/built-ins/Math/cosh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.cosh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.cosh), false, 'isConstructor(Math.cosh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.cosh();
+}, '`new Math.cosh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/exp/not-a-constructor.js b/test/built-ins/Math/exp/not-a-constructor.js
new file mode 100644
index 0000000000..4f26dfbd28
--- /dev/null
+++ b/test/built-ins/Math/exp/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.exp does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.exp), false, 'isConstructor(Math.exp) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.exp();
+}, '`new Math.exp()` throws TypeError');
+    
diff --git a/test/built-ins/Math/expm1/not-a-constructor.js b/test/built-ins/Math/expm1/not-a-constructor.js
new file mode 100644
index 0000000000..6d59db44fc
--- /dev/null
+++ b/test/built-ins/Math/expm1/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.expm1 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.expm1), false, 'isConstructor(Math.expm1) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.expm1();
+}, '`new Math.expm1()` throws TypeError');
+    
diff --git a/test/built-ins/Math/floor/not-a-constructor.js b/test/built-ins/Math/floor/not-a-constructor.js
new file mode 100644
index 0000000000..4addd3abd3
--- /dev/null
+++ b/test/built-ins/Math/floor/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.floor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.floor), false, 'isConstructor(Math.floor) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.floor();
+}, '`new Math.floor()` throws TypeError');
+    
diff --git a/test/built-ins/Math/fround/not-a-constructor.js b/test/built-ins/Math/fround/not-a-constructor.js
new file mode 100644
index 0000000000..fc5543babb
--- /dev/null
+++ b/test/built-ins/Math/fround/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.fround does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.fround), false, 'isConstructor(Math.fround) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.fround();
+}, '`new Math.fround()` throws TypeError');
+    
diff --git a/test/built-ins/Math/hypot/not-a-constructor.js b/test/built-ins/Math/hypot/not-a-constructor.js
new file mode 100644
index 0000000000..5b497f4c7c
--- /dev/null
+++ b/test/built-ins/Math/hypot/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.hypot does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.hypot), false, 'isConstructor(Math.hypot) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.hypot();
+}, '`new Math.hypot()` throws TypeError');
+    
diff --git a/test/built-ins/Math/imul/not-a-constructor.js b/test/built-ins/Math/imul/not-a-constructor.js
new file mode 100644
index 0000000000..8884b15f63
--- /dev/null
+++ b/test/built-ins/Math/imul/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.imul does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.imul), false, 'isConstructor(Math.imul) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.imul();
+}, '`new Math.imul()` throws TypeError');
+    
diff --git a/test/built-ins/Math/log/not-a-constructor.js b/test/built-ins/Math/log/not-a-constructor.js
new file mode 100644
index 0000000000..5435e4bb3d
--- /dev/null
+++ b/test/built-ins/Math/log/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.log does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.log), false, 'isConstructor(Math.log) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.log();
+}, '`new Math.log()` throws TypeError');
+    
diff --git a/test/built-ins/Math/log10/not-a-constructor.js b/test/built-ins/Math/log10/not-a-constructor.js
new file mode 100644
index 0000000000..58c759918d
--- /dev/null
+++ b/test/built-ins/Math/log10/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.log10 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.log10), false, 'isConstructor(Math.log10) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.log10();
+}, '`new Math.log10()` throws TypeError');
+    
diff --git a/test/built-ins/Math/log1p/not-a-constructor.js b/test/built-ins/Math/log1p/not-a-constructor.js
new file mode 100644
index 0000000000..06e952d8f8
--- /dev/null
+++ b/test/built-ins/Math/log1p/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.log1p does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.log1p), false, 'isConstructor(Math.log1p) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.log1p();
+}, '`new Math.log1p()` throws TypeError');
+    
diff --git a/test/built-ins/Math/log2/not-a-constructor.js b/test/built-ins/Math/log2/not-a-constructor.js
new file mode 100644
index 0000000000..c08eddae0b
--- /dev/null
+++ b/test/built-ins/Math/log2/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.log2 does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.log2), false, 'isConstructor(Math.log2) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.log2();
+}, '`new Math.log2()` throws TypeError');
+    
diff --git a/test/built-ins/Math/max/not-a-constructor.js b/test/built-ins/Math/max/not-a-constructor.js
new file mode 100644
index 0000000000..f0811b3cf8
--- /dev/null
+++ b/test/built-ins/Math/max/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.max does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.max), false, 'isConstructor(Math.max) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.max();
+}, '`new Math.max()` throws TypeError');
+    
diff --git a/test/built-ins/Math/min/not-a-constructor.js b/test/built-ins/Math/min/not-a-constructor.js
new file mode 100644
index 0000000000..47370e4411
--- /dev/null
+++ b/test/built-ins/Math/min/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.min does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.min), false, 'isConstructor(Math.min) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.min();
+}, '`new Math.min()` throws TypeError');
+    
diff --git a/test/built-ins/Math/pow/not-a-constructor.js b/test/built-ins/Math/pow/not-a-constructor.js
new file mode 100644
index 0000000000..fad4c25dbf
--- /dev/null
+++ b/test/built-ins/Math/pow/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.pow does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.pow), false, 'isConstructor(Math.pow) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.pow();
+}, '`new Math.pow()` throws TypeError');
+    
diff --git a/test/built-ins/Math/random/not-a-constructor.js b/test/built-ins/Math/random/not-a-constructor.js
new file mode 100644
index 0000000000..55752baca5
--- /dev/null
+++ b/test/built-ins/Math/random/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.random does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.random), false, 'isConstructor(Math.random) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.random();
+}, '`new Math.random()` throws TypeError');
+    
diff --git a/test/built-ins/Math/round/not-a-constructor.js b/test/built-ins/Math/round/not-a-constructor.js
new file mode 100644
index 0000000000..2f9ada06a9
--- /dev/null
+++ b/test/built-ins/Math/round/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.round does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.round), false, 'isConstructor(Math.round) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.round();
+}, '`new Math.round()` throws TypeError');
+    
diff --git a/test/built-ins/Math/sign/not-a-constructor.js b/test/built-ins/Math/sign/not-a-constructor.js
new file mode 100644
index 0000000000..df7cf0ed0c
--- /dev/null
+++ b/test/built-ins/Math/sign/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.sign does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.sign), false, 'isConstructor(Math.sign) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.sign();
+}, '`new Math.sign()` throws TypeError');
+    
diff --git a/test/built-ins/Math/sin/not-a-constructor.js b/test/built-ins/Math/sin/not-a-constructor.js
new file mode 100644
index 0000000000..cba00547f6
--- /dev/null
+++ b/test/built-ins/Math/sin/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.sin does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.sin), false, 'isConstructor(Math.sin) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.sin();
+}, '`new Math.sin()` throws TypeError');
+    
diff --git a/test/built-ins/Math/sinh/not-a-constructor.js b/test/built-ins/Math/sinh/not-a-constructor.js
new file mode 100644
index 0000000000..d669d71faf
--- /dev/null
+++ b/test/built-ins/Math/sinh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.sinh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.sinh), false, 'isConstructor(Math.sinh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.sinh();
+}, '`new Math.sinh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/sqrt/not-a-constructor.js b/test/built-ins/Math/sqrt/not-a-constructor.js
new file mode 100644
index 0000000000..a542d1ecf6
--- /dev/null
+++ b/test/built-ins/Math/sqrt/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.sqrt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.sqrt), false, 'isConstructor(Math.sqrt) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.sqrt();
+}, '`new Math.sqrt()` throws TypeError');
+    
diff --git a/test/built-ins/Math/tan/not-a-constructor.js b/test/built-ins/Math/tan/not-a-constructor.js
new file mode 100644
index 0000000000..bc053f5275
--- /dev/null
+++ b/test/built-ins/Math/tan/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.tan does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.tan), false, 'isConstructor(Math.tan) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.tan();
+}, '`new Math.tan()` throws TypeError');
+    
diff --git a/test/built-ins/Math/tanh/not-a-constructor.js b/test/built-ins/Math/tanh/not-a-constructor.js
new file mode 100644
index 0000000000..b91f195000
--- /dev/null
+++ b/test/built-ins/Math/tanh/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.tanh does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.tanh), false, 'isConstructor(Math.tanh) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.tanh();
+}, '`new Math.tanh()` throws TypeError');
+    
diff --git a/test/built-ins/Math/trunc/not-a-constructor.js b/test/built-ins/Math/trunc/not-a-constructor.js
new file mode 100644
index 0000000000..7abd8df2c0
--- /dev/null
+++ b/test/built-ins/Math/trunc/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Math.trunc does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Math.trunc), false, 'isConstructor(Math.trunc) must return false');
+
+assert.throws(TypeError, () => {
+  new Math.trunc();
+}, '`new Math.trunc()` throws TypeError');
+    
diff --git a/test/built-ins/Number/isFinite/not-a-constructor.js b/test/built-ins/Number/isFinite/not-a-constructor.js
new file mode 100644
index 0000000000..ec49e89efb
--- /dev/null
+++ b/test/built-ins/Number/isFinite/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.isFinite does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.isFinite), false, 'isConstructor(Number.isFinite) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.isFinite();
+}, '`new Number.isFinite()` throws TypeError');
+    
diff --git a/test/built-ins/Number/isInteger/not-a-constructor.js b/test/built-ins/Number/isInteger/not-a-constructor.js
new file mode 100644
index 0000000000..5f1c73de68
--- /dev/null
+++ b/test/built-ins/Number/isInteger/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.isInteger does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.isInteger), false, 'isConstructor(Number.isInteger) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.isInteger();
+}, '`new Number.isInteger()` throws TypeError');
+    
diff --git a/test/built-ins/Number/isNaN/not-a-constructor.js b/test/built-ins/Number/isNaN/not-a-constructor.js
new file mode 100644
index 0000000000..009245ce64
--- /dev/null
+++ b/test/built-ins/Number/isNaN/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.isNaN does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.isNaN), false, 'isConstructor(Number.isNaN) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.isNaN();
+}, '`new Number.isNaN()` throws TypeError');
+    
diff --git a/test/built-ins/Number/isSafeInteger/not-a-constructor.js b/test/built-ins/Number/isSafeInteger/not-a-constructor.js
new file mode 100644
index 0000000000..60af065748
--- /dev/null
+++ b/test/built-ins/Number/isSafeInteger/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.isSafeInteger does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.isSafeInteger), false, 'isConstructor(Number.isSafeInteger) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.isSafeInteger();
+}, '`new Number.isSafeInteger()` throws TypeError');
+    
diff --git a/test/built-ins/Number/parseFloat/not-a-constructor.js b/test/built-ins/Number/parseFloat/not-a-constructor.js
new file mode 100644
index 0000000000..a756f03d61
--- /dev/null
+++ b/test/built-ins/Number/parseFloat/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.parseFloat does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.parseFloat), false, 'isConstructor(Number.parseFloat) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.parseFloat();
+}, '`new Number.parseFloat()` throws TypeError');
+    
diff --git a/test/built-ins/Number/parseInt/not-a-constructor.js b/test/built-ins/Number/parseInt/not-a-constructor.js
new file mode 100644
index 0000000000..9a3936fe52
--- /dev/null
+++ b/test/built-ins/Number/parseInt/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.parseInt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Number.parseInt), false, 'isConstructor(Number.parseInt) must return false');
+
+assert.throws(TypeError, () => {
+  new Number.parseInt();
+}, '`new Number.parseInt()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/toExponential/not-a-constructor.js b/test/built-ins/Number/prototype/toExponential/not-a-constructor.js
new file mode 100644
index 0000000000..3a72ca7fac
--- /dev/null
+++ b/test/built-ins/Number/prototype/toExponential/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.toExponential does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.toExponential),
+  false,
+  'isConstructor(Number.prototype.toExponential) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.toExponential();
+}, '`new Number.prototype.toExponential()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/toFixed/not-a-constructor.js b/test/built-ins/Number/prototype/toFixed/not-a-constructor.js
new file mode 100644
index 0000000000..3a85fd9ba9
--- /dev/null
+++ b/test/built-ins/Number/prototype/toFixed/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.toFixed does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.toFixed),
+  false,
+  'isConstructor(Number.prototype.toFixed) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.toFixed();
+}, '`new Number.prototype.toFixed()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/Number/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..1e76f2e4b4
--- /dev/null
+++ b/test/built-ins/Number/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.toLocaleString),
+  false,
+  'isConstructor(Number.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.toLocaleString();
+}, '`new Number.prototype.toLocaleString()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/toPrecision/not-a-constructor.js b/test/built-ins/Number/prototype/toPrecision/not-a-constructor.js
new file mode 100644
index 0000000000..a53a27b89c
--- /dev/null
+++ b/test/built-ins/Number/prototype/toPrecision/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.toPrecision does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.toPrecision),
+  false,
+  'isConstructor(Number.prototype.toPrecision) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.toPrecision();
+}, '`new Number.prototype.toPrecision()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/toString/not-a-constructor.js b/test/built-ins/Number/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..07463ab860
--- /dev/null
+++ b/test/built-ins/Number/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.toString),
+  false,
+  'isConstructor(Number.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.toString();
+}, '`new Number.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Number/prototype/valueOf/not-a-constructor.js b/test/built-ins/Number/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..18c83fe80e
--- /dev/null
+++ b/test/built-ins/Number/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Number.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Number.prototype.valueOf),
+  false,
+  'isConstructor(Number.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Number.prototype.valueOf();
+}, '`new Number.prototype.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/Object/assign/not-a-constructor.js b/test/built-ins/Object/assign/not-a-constructor.js
new file mode 100644
index 0000000000..26ba247af5
--- /dev/null
+++ b/test/built-ins/Object/assign/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.assign does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.assign), false, 'isConstructor(Object.assign) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.assign({});
+}, '`new Object.assign({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/create/not-a-constructor.js b/test/built-ins/Object/create/not-a-constructor.js
new file mode 100644
index 0000000000..6c54b5f32e
--- /dev/null
+++ b/test/built-ins/Object/create/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.create does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.create), false, 'isConstructor(Object.create) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.create(null);
+}, '`new Object.create(null)` throws TypeError');
+    
diff --git a/test/built-ins/Object/defineProperties/not-a-constructor.js b/test/built-ins/Object/defineProperties/not-a-constructor.js
new file mode 100644
index 0000000000..fc32fa9e2d
--- /dev/null
+++ b/test/built-ins/Object/defineProperties/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.defineProperties does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.defineProperties),
+  false,
+  'isConstructor(Object.defineProperties) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.defineProperties({}, {});
+}, '`new Object.defineProperties({}, {})` throws TypeError');
+    
diff --git a/test/built-ins/Object/defineProperty/not-a-constructor.js b/test/built-ins/Object/defineProperty/not-a-constructor.js
new file mode 100644
index 0000000000..5432ca72db
--- /dev/null
+++ b/test/built-ins/Object/defineProperty/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.defineProperty does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.defineProperty),
+  false,
+  'isConstructor(Object.defineProperty) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.defineProperty({}, '', {});
+}, '`new Object.defineProperty({}, \'\', {})` throws TypeError');
+    
diff --git a/test/built-ins/Object/entries/not-a-constructor.js b/test/built-ins/Object/entries/not-a-constructor.js
new file mode 100644
index 0000000000..63d6359485
--- /dev/null
+++ b/test/built-ins/Object/entries/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.entries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.entries), false, 'isConstructor(Object.entries) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.entries({});
+}, '`new Object.entries({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/freeze/not-a-constructor.js b/test/built-ins/Object/freeze/not-a-constructor.js
new file mode 100644
index 0000000000..9c126fcba2
--- /dev/null
+++ b/test/built-ins/Object/freeze/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.freeze does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.freeze), false, 'isConstructor(Object.freeze) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.freeze({});
+}, '`new Object.freeze({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/fromEntries/not-a-constructor.js b/test/built-ins/Object/fromEntries/not-a-constructor.js
new file mode 100644
index 0000000000..fd9ab8da3e
--- /dev/null
+++ b/test/built-ins/Object/fromEntries/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.fromEntries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Object.fromEntries, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.fromEntries), false, 'isConstructor(Object.fromEntries) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.fromEntries([]);
+}, '`new Object.fromEntries([])` throws TypeError');
+    
diff --git a/test/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js b/test/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js
new file mode 100644
index 0000000000..ca919af3e0
--- /dev/null
+++ b/test/built-ins/Object/getOwnPropertyDescriptor/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getOwnPropertyDescriptor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getOwnPropertyDescriptor),
+  false,
+  'isConstructor(Object.getOwnPropertyDescriptor) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.getOwnPropertyDescriptor({}, '');
+}, '`new Object.getOwnPropertyDescriptor({}, \'\')` throws TypeError');
+    
diff --git a/test/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js b/test/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js
new file mode 100644
index 0000000000..ef8fd3d1f8
--- /dev/null
+++ b/test/built-ins/Object/getOwnPropertyDescriptors/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getOwnPropertyDescriptors does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getOwnPropertyDescriptors),
+  false,
+  'isConstructor(Object.getOwnPropertyDescriptors) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.getOwnPropertyDescriptors({});
+}, '`new Object.getOwnPropertyDescriptors({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/getOwnPropertyNames/not-a-constructor.js b/test/built-ins/Object/getOwnPropertyNames/not-a-constructor.js
new file mode 100644
index 0000000000..98c29dbcbd
--- /dev/null
+++ b/test/built-ins/Object/getOwnPropertyNames/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getOwnPropertyNames does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getOwnPropertyNames),
+  false,
+  'isConstructor(Object.getOwnPropertyNames) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.getOwnPropertyNames({});
+}, '`new Object.getOwnPropertyNames({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js b/test/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js
new file mode 100644
index 0000000000..27f302676d
--- /dev/null
+++ b/test/built-ins/Object/getOwnPropertySymbols/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getOwnPropertySymbols does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getOwnPropertySymbols),
+  false,
+  'isConstructor(Object.getOwnPropertySymbols) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.getOwnPropertySymbols({});
+}, '`new Object.getOwnPropertySymbols({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/getPrototypeOf/not-a-constructor.js b/test/built-ins/Object/getPrototypeOf/not-a-constructor.js
new file mode 100644
index 0000000000..5064fc08c7
--- /dev/null
+++ b/test/built-ins/Object/getPrototypeOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.getPrototypeOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.getPrototypeOf),
+  false,
+  'isConstructor(Object.getPrototypeOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.getPrototypeOf({});
+}, '`new Object.getPrototypeOf({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/is/not-a-constructor.js b/test/built-ins/Object/is/not-a-constructor.js
new file mode 100644
index 0000000000..e798b75a2b
--- /dev/null
+++ b/test/built-ins/Object/is/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.is does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Object.is, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.is), false, 'isConstructor(Object.is) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.is(0, 0);
+}, '`new Object.is(0, 0)` throws TypeError');
+    
diff --git a/test/built-ins/Object/isExtensible/not-a-constructor.js b/test/built-ins/Object/isExtensible/not-a-constructor.js
new file mode 100644
index 0000000000..fd01fb059f
--- /dev/null
+++ b/test/built-ins/Object/isExtensible/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.isExtensible does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.isExtensible), false, 'isConstructor(Object.isExtensible) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.isExtensible({});
+}, '`new Object.isExtensible({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/isFrozen/not-a-constructor.js b/test/built-ins/Object/isFrozen/not-a-constructor.js
new file mode 100644
index 0000000000..b1acf2c2ae
--- /dev/null
+++ b/test/built-ins/Object/isFrozen/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.isFrozen does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.isFrozen), false, 'isConstructor(Object.isFrozen) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.isFrozen({});
+}, '`new Object.isFrozen({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/isSealed/not-a-constructor.js b/test/built-ins/Object/isSealed/not-a-constructor.js
new file mode 100644
index 0000000000..67afdadf18
--- /dev/null
+++ b/test/built-ins/Object/isSealed/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.isSealed does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.isSealed), false, 'isConstructor(Object.isSealed) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.isSealed({});
+}, '`new Object.isSealed({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/keys/not-a-constructor.js b/test/built-ins/Object/keys/not-a-constructor.js
new file mode 100644
index 0000000000..010d83a3ff
--- /dev/null
+++ b/test/built-ins/Object/keys/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.keys does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.keys), false, 'isConstructor(Object.keys) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.keys({});
+}, '`new Object.keys({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/preventExtensions/not-a-constructor.js b/test/built-ins/Object/preventExtensions/not-a-constructor.js
new file mode 100644
index 0000000000..85c7193e4c
--- /dev/null
+++ b/test/built-ins/Object/preventExtensions/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.preventExtensions does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.preventExtensions),
+  false,
+  'isConstructor(Object.preventExtensions) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.preventExtensions({});
+}, '`new Object.preventExtensions({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js b/test/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js
new file mode 100644
index 0000000000..9127a90363
--- /dev/null
+++ b/test/built-ins/Object/prototype/hasOwnProperty/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.hasOwnProperty does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.hasOwnProperty),
+  false,
+  'isConstructor(Object.prototype.hasOwnProperty) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.hasOwnProperty('');
+}, '`new Object.prototype.hasOwnProperty(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js b/test/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js
new file mode 100644
index 0000000000..38357e0cd9
--- /dev/null
+++ b/test/built-ins/Object/prototype/isPrototypeOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.isPrototypeOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.isPrototypeOf),
+  false,
+  'isConstructor(Object.prototype.isPrototypeOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.isPrototypeOf({});
+}, '`new Object.prototype.isPrototypeOf({})` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js b/test/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js
new file mode 100644
index 0000000000..eb1170bad3
--- /dev/null
+++ b/test/built-ins/Object/prototype/propertyIsEnumerable/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.propertyIsEnumerable does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.propertyIsEnumerable),
+  false,
+  'isConstructor(Object.prototype.propertyIsEnumerable) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.propertyIsEnumerable('');
+}, '`new Object.prototype.propertyIsEnumerable(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/Object/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..3d67be4488
--- /dev/null
+++ b/test/built-ins/Object/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.toLocaleString),
+  false,
+  'isConstructor(Object.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.toLocaleString('');
+}, '`new Object.prototype.toLocaleString(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/toString/not-a-constructor.js b/test/built-ins/Object/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..1e37e46510
--- /dev/null
+++ b/test/built-ins/Object/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.toString),
+  false,
+  'isConstructor(Object.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.toString();
+}, '`new Object.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Object/prototype/valueOf/not-a-constructor.js b/test/built-ins/Object/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..7f87d77208
--- /dev/null
+++ b/test/built-ins/Object/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.prototype.valueOf),
+  false,
+  'isConstructor(Object.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.prototype.valueOf();
+}, '`new Object.prototype.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/Object/seal/not-a-constructor.js b/test/built-ins/Object/seal/not-a-constructor.js
new file mode 100644
index 0000000000..88f74d963f
--- /dev/null
+++ b/test/built-ins/Object/seal/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.seal does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.seal), false, 'isConstructor(Object.seal) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.seal();
+}, '`new Object.seal()` throws TypeError');
+    
diff --git a/test/built-ins/Object/setPrototypeOf/not-a-constructor.js b/test/built-ins/Object/setPrototypeOf/not-a-constructor.js
new file mode 100644
index 0000000000..967903fc80
--- /dev/null
+++ b/test/built-ins/Object/setPrototypeOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.setPrototypeOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.setPrototypeOf),
+  false,
+  'isConstructor(Object.setPrototypeOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.setPrototypeOf({}, {});
+}, '`new Object.setPrototypeOf({}, {})` throws TypeError');
+    
diff --git a/test/built-ins/Object/values/not-a-constructor.js b/test/built-ins/Object/values/not-a-constructor.js
new file mode 100644
index 0000000000..50ce82012b
--- /dev/null
+++ b/test/built-ins/Object/values/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.values does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Object.values), false, 'isConstructor(Object.values) must return false');
+
+assert.throws(TypeError, () => {
+  new Object.values({});
+}, '`new Object.values({})` throws TypeError');
+    
diff --git a/test/built-ins/Promise/all/not-a-constructor.js b/test/built-ins/Promise/all/not-a-constructor.js
new file mode 100644
index 0000000000..98dd7fc190
--- /dev/null
+++ b/test/built-ins/Promise/all/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.all does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.all), false, 'isConstructor(Promise.all) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.all([]);
+}, '`new Promise.all([])` throws TypeError');
+    
diff --git a/test/built-ins/Promise/allSettled/not-a-constructor.js b/test/built-ins/Promise/allSettled/not-a-constructor.js
new file mode 100644
index 0000000000..f519716f8f
--- /dev/null
+++ b/test/built-ins/Promise/allSettled/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.allSettled does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Promise.allSettled, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.allSettled), false, 'isConstructor(Promise.allSettled) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.allSettled();
+}, '`new Promise.allSettled()` throws TypeError');
+    
diff --git a/test/built-ins/Promise/any/not-a-constructor.js b/test/built-ins/Promise/any/not-a-constructor.js
new file mode 100644
index 0000000000..f739b23307
--- /dev/null
+++ b/test/built-ins/Promise/any/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.any does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Promise.any, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.any), false, 'isConstructor(Promise.any) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.any([1]);
+}, '`new Promise.any([1])` throws TypeError');
+    
diff --git a/test/built-ins/Promise/prototype/catch/not-a-constructor.js b/test/built-ins/Promise/prototype/catch/not-a-constructor.js
new file mode 100644
index 0000000000..722d1982cf
--- /dev/null
+++ b/test/built-ins/Promise/prototype/catch/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.prototype.catch does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Promise.prototype.catch),
+  false,
+  'isConstructor(Promise.prototype.catch) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let p = new Promise(() => {}); new p.catch();
+}, '`let p = new Promise(() => {}); new p.catch()` throws TypeError');
+    
diff --git a/test/built-ins/Promise/prototype/finally/not-a-constructor.js b/test/built-ins/Promise/prototype/finally/not-a-constructor.js
new file mode 100644
index 0000000000..c6e2a37bc1
--- /dev/null
+++ b/test/built-ins/Promise/prototype/finally/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.prototype.finally does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Promise.prototype.finally, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Promise.prototype.finally),
+  false,
+  'isConstructor(Promise.prototype.finally) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let p = new Promise(() => {}); new p.finally();
+}, '`let p = new Promise(() => {}); new p.finally()` throws TypeError');
+    
diff --git a/test/built-ins/Promise/prototype/then/not-a-constructor.js b/test/built-ins/Promise/prototype/then/not-a-constructor.js
new file mode 100644
index 0000000000..8e1c13b249
--- /dev/null
+++ b/test/built-ins/Promise/prototype/then/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.prototype.then does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Promise.prototype.then),
+  false,
+  'isConstructor(Promise.prototype.then) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let p = new Promise(() => {}); new p.then();
+}, '`let p = new Promise(() => {}); new p.then()` throws TypeError');
+    
diff --git a/test/built-ins/Promise/race/not-a-constructor.js b/test/built-ins/Promise/race/not-a-constructor.js
new file mode 100644
index 0000000000..347c54736f
--- /dev/null
+++ b/test/built-ins/Promise/race/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.race does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.race), false, 'isConstructor(Promise.race) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.race([]);
+}, '`new Promise.race([])` throws TypeError');
+    
diff --git a/test/built-ins/Promise/reject/not-a-constructor.js b/test/built-ins/Promise/reject/not-a-constructor.js
new file mode 100644
index 0000000000..9c8498de90
--- /dev/null
+++ b/test/built-ins/Promise/reject/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.reject does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.reject), false, 'isConstructor(Promise.reject) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.reject();
+}, '`new Promise.reject()` throws TypeError');
+    
diff --git a/test/built-ins/Promise/resolve/not-a-constructor.js b/test/built-ins/Promise/resolve/not-a-constructor.js
new file mode 100644
index 0000000000..422bbe0b7c
--- /dev/null
+++ b/test/built-ins/Promise/resolve/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Promise.resolve does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Promise.resolve), false, 'isConstructor(Promise.resolve) must return false');
+
+assert.throws(TypeError, () => {
+  new Promise.resolve();
+}, '`new Promise.resolve()` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/apply/not-a-constructor.js b/test/built-ins/Reflect/apply/not-a-constructor.js
new file mode 100644
index 0000000000..cda2a97d23
--- /dev/null
+++ b/test/built-ins/Reflect/apply/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.apply does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.apply), false, 'isConstructor(Reflect.apply) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.apply(() => {}, undefined, []);
+}, '`new Reflect.apply(() => {}, undefined, [])` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/construct/not-a-constructor.js b/test/built-ins/Reflect/construct/not-a-constructor.js
new file mode 100644
index 0000000000..4a053f04b6
--- /dev/null
+++ b/test/built-ins/Reflect/construct/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.construct does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.construct), false, 'isConstructor(Reflect.construct) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.construct(Function, [], Function);
+}, '`new Reflect.construct(Function, [], Function)` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/defineProperty/not-a-constructor.js b/test/built-ins/Reflect/defineProperty/not-a-constructor.js
new file mode 100644
index 0000000000..30cf37a9e3
--- /dev/null
+++ b/test/built-ins/Reflect/defineProperty/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.defineProperty does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.defineProperty),
+  false,
+  'isConstructor(Reflect.defineProperty) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.defineProperty({}, '');
+}, '`new Reflect.defineProperty({}, \'\')` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/deleteProperty/not-a-constructor.js b/test/built-ins/Reflect/deleteProperty/not-a-constructor.js
new file mode 100644
index 0000000000..928f46bd11
--- /dev/null
+++ b/test/built-ins/Reflect/deleteProperty/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.deleteProperty does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.deleteProperty),
+  false,
+  'isConstructor(Reflect.deleteProperty) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.deleteProperty({}, '');
+}, '`new Reflect.deleteProperty({}, \'\')` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/get/not-a-constructor.js b/test/built-ins/Reflect/get/not-a-constructor.js
new file mode 100644
index 0000000000..c5971fb332
--- /dev/null
+++ b/test/built-ins/Reflect/get/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.get does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.get), false, 'isConstructor(Reflect.get) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.get({}, '');
+}, '`new Reflect.get({}, \'\')` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/getOwnPropertyDescriptor/not-a-constructor.js b/test/built-ins/Reflect/getOwnPropertyDescriptor/not-a-constructor.js
new file mode 100644
index 0000000000..5a59ddc41f
--- /dev/null
+++ b/test/built-ins/Reflect/getOwnPropertyDescriptor/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.getOwnPropertyDescriptor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.getOwnPropertyDescriptor),
+  false,
+  'isConstructor(Reflect.getOwnPropertyDescriptor) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.getOwnPropertyDescriptor({}, '');
+}, '`new Reflect.getOwnPropertyDescriptor({}, \'\')` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/getPrototypeOf/not-a-constructor.js b/test/built-ins/Reflect/getPrototypeOf/not-a-constructor.js
new file mode 100644
index 0000000000..18bd7be95a
--- /dev/null
+++ b/test/built-ins/Reflect/getPrototypeOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.getPrototypeOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.getPrototypeOf),
+  false,
+  'isConstructor(Reflect.getPrototypeOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.getPrototypeOf({});
+}, '`new Reflect.getPrototypeOf({})` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/has/not-a-constructor.js b/test/built-ins/Reflect/has/not-a-constructor.js
new file mode 100644
index 0000000000..d2ccbb966c
--- /dev/null
+++ b/test/built-ins/Reflect/has/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.has does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.has), false, 'isConstructor(Reflect.has) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.has();
+}, '`new Reflect.has()` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/isExtensible/not-a-constructor.js b/test/built-ins/Reflect/isExtensible/not-a-constructor.js
new file mode 100644
index 0000000000..00e4480b24
--- /dev/null
+++ b/test/built-ins/Reflect/isExtensible/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.isExtensible does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.isExtensible), false, 'isConstructor(Reflect.isExtensible) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.isExtensible({});
+}, '`new Reflect.isExtensible({})` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/ownKeys/not-a-constructor.js b/test/built-ins/Reflect/ownKeys/not-a-constructor.js
new file mode 100644
index 0000000000..48d2876801
--- /dev/null
+++ b/test/built-ins/Reflect/ownKeys/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.ownKeys does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.ownKeys), false, 'isConstructor(Reflect.ownKeys) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.ownKeys({});
+}, '`new Reflect.ownKeys({})` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/preventExtensions/not-a-constructor.js b/test/built-ins/Reflect/preventExtensions/not-a-constructor.js
new file mode 100644
index 0000000000..a0197cded6
--- /dev/null
+++ b/test/built-ins/Reflect/preventExtensions/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.preventExtensions does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.preventExtensions),
+  false,
+  'isConstructor(Reflect.preventExtensions) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.preventExtensions({});
+}, '`new Reflect.preventExtensions({})` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/set/not-a-constructor.js b/test/built-ins/Reflect/set/not-a-constructor.js
new file mode 100644
index 0000000000..71819b568c
--- /dev/null
+++ b/test/built-ins/Reflect/set/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.set does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, Reflect.set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Reflect.set), false, 'isConstructor(Reflect.set) must return false');
+
+assert.throws(TypeError, () => {
+  new Reflect.set({});
+}, '`new Reflect.set({})` throws TypeError');
+    
diff --git a/test/built-ins/Reflect/setPrototypeOf/not-a-constructor.js b/test/built-ins/Reflect/setPrototypeOf/not-a-constructor.js
new file mode 100644
index 0000000000..757bad1fc7
--- /dev/null
+++ b/test/built-ins/Reflect/setPrototypeOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Reflect.setPrototypeOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Reflect, Reflect.setPrototypeOf, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Reflect.setPrototypeOf),
+  false,
+  'isConstructor(Reflect.setPrototypeOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Reflect.setPrototypeOf({}, {});
+}, '`new Reflect.setPrototypeOf({}, {})` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/Symbol.match/not-a-constructor.js b/test/built-ins/RegExp/prototype/Symbol.match/not-a-constructor.js
new file mode 100644
index 0000000000..e8c4e00b02
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/Symbol.match/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype[Symbol.match] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.match, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype[Symbol.match]),
+  false,
+  'isConstructor(RegExp.prototype[Symbol.match]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re[Symbol.match]();
+}, '`let re = new RegExp(\'\'); new re[Symbol.match]()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/Symbol.matchAll/not-a-constructor.js b/test/built-ins/RegExp/prototype/Symbol.matchAll/not-a-constructor.js
new file mode 100644
index 0000000000..7183035ab3
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/Symbol.matchAll/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype[Symbol.matchAll] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.match, Symbol.matchAll, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype[Symbol.matchAll]),
+  false,
+  'isConstructor(RegExp.prototype[Symbol.matchAll]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re[Symbol.matchAll]();
+}, '`let re = new RegExp(\'\'); new re[Symbol.matchAll]()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/Symbol.replace/not-a-constructor.js b/test/built-ins/RegExp/prototype/Symbol.replace/not-a-constructor.js
new file mode 100644
index 0000000000..b8ee0a8d4e
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/Symbol.replace/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype[Symbol.replace] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.replace, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype[Symbol.replace]),
+  false,
+  'isConstructor(RegExp.prototype[Symbol.replace]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re[Symbol.replace]();
+}, '`let re = new RegExp(\'\'); new re[Symbol.replace]()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/Symbol.search/not-a-constructor.js b/test/built-ins/RegExp/prototype/Symbol.search/not-a-constructor.js
new file mode 100644
index 0000000000..74c2a6121b
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/Symbol.search/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype[Symbol.search] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.search, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype[Symbol.search]),
+  false,
+  'isConstructor(RegExp.prototype[Symbol.search]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re[Symbol.search]();
+}, '`let re = new RegExp(\'\'); new re[Symbol.search]()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/Symbol.split/not-a-constructor.js b/test/built-ins/RegExp/prototype/Symbol.split/not-a-constructor.js
new file mode 100644
index 0000000000..2bfd76e978
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/Symbol.split/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype[Symbol.split] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.split, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype[Symbol.split]),
+  false,
+  'isConstructor(RegExp.prototype[Symbol.split]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re[Symbol.split]();
+}, '`let re = new RegExp(\'\'); new re[Symbol.split]()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/exec/not-a-constructor.js b/test/built-ins/RegExp/prototype/exec/not-a-constructor.js
new file mode 100644
index 0000000000..e71752f8e9
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/exec/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype.exec does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype.exec),
+  false,
+  'isConstructor(RegExp.prototype.exec) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re.exec();
+}, '`let re = new RegExp(\'\'); new re.exec()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/test/not-a-constructor.js b/test/built-ins/RegExp/prototype/test/not-a-constructor.js
new file mode 100644
index 0000000000..86b8f9da23
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/test/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype.test does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype.test),
+  false,
+  'isConstructor(RegExp.prototype.test) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re.test();
+}, '`let re = new RegExp(\'\'); new re.test()` throws TypeError');
+    
diff --git a/test/built-ins/RegExp/prototype/toString/not-a-constructor.js b/test/built-ins/RegExp/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..bf27374f53
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  RegExp.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(RegExp.prototype.toString),
+  false,
+  'isConstructor(RegExp.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let re = new RegExp(''); new re.toString();
+}, '`let re = new RegExp(\'\'); new re.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/Symbol.iterator/not-a-constructor.js b/test/built-ins/Set/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..a40673cb2f
--- /dev/null
+++ b/test/built-ins/Set/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype[Symbol.iterator] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, Set, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Set.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(Set.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s[Symbol.iterator]();
+}, '`let s = new Set([]); new s[Symbol.iterator]()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/add/not-a-constructor.js b/test/built-ins/Set/prototype/add/not-a-constructor.js
new file mode 100644
index 0000000000..b57c17c05d
--- /dev/null
+++ b/test/built-ins/Set/prototype/add/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.add does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Set.prototype.add), false, 'isConstructor(Set.prototype.add) must return false');
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.add();
+}, '`let s = new Set([]); new s.add()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/clear/not-a-constructor.js b/test/built-ins/Set/prototype/clear/not-a-constructor.js
new file mode 100644
index 0000000000..945b19a6ea
--- /dev/null
+++ b/test/built-ins/Set/prototype/clear/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.clear does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Set.prototype.clear), false, 'isConstructor(Set.prototype.clear) must return false');
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.clear();
+}, '`let s = new Set([]); new s.clear()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/delete/not-a-constructor.js b/test/built-ins/Set/prototype/delete/not-a-constructor.js
new file mode 100644
index 0000000000..5561983d12
--- /dev/null
+++ b/test/built-ins/Set/prototype/delete/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.delete does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Set.prototype.delete), false, 'isConstructor(Set.prototype.delete) must return false');
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.delete();
+}, '`let s = new Set([]); new s.delete()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/entries/not-a-constructor.js b/test/built-ins/Set/prototype/entries/not-a-constructor.js
new file mode 100644
index 0000000000..859fb3bdd0
--- /dev/null
+++ b/test/built-ins/Set/prototype/entries/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.entries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Set.prototype.entries),
+  false,
+  'isConstructor(Set.prototype.entries) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.entries();
+}, '`let s = new Set([]); new s.entries()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/forEach/not-a-constructor.js b/test/built-ins/Set/prototype/forEach/not-a-constructor.js
new file mode 100644
index 0000000000..81182abcc3
--- /dev/null
+++ b/test/built-ins/Set/prototype/forEach/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.forEach does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Set.prototype.forEach),
+  false,
+  'isConstructor(Set.prototype.forEach) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.forEach(() => {});
+}, '`let s = new Set([]); new s.forEach(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/has/not-a-constructor.js b/test/built-ins/Set/prototype/has/not-a-constructor.js
new file mode 100644
index 0000000000..4b102b8e17
--- /dev/null
+++ b/test/built-ins/Set/prototype/has/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.has does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Set.prototype.has), false, 'isConstructor(Set.prototype.has) must return false');
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.has();
+}, '`let s = new Set([]); new s.has()` throws TypeError');
+    
diff --git a/test/built-ins/Set/prototype/values/not-a-constructor.js b/test/built-ins/Set/prototype/values/not-a-constructor.js
new file mode 100644
index 0000000000..c3f8ba336e
--- /dev/null
+++ b/test/built-ins/Set/prototype/values/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Set.prototype.values does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Set, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Set.prototype.values), false, 'isConstructor(Set.prototype.values) must return false');
+
+assert.throws(TypeError, () => {
+  let s = new Set([]); new s.values();
+}, '`let s = new Set([]); new s.values()` throws TypeError');
+    
diff --git a/test/built-ins/SharedArrayBuffer/prototype/slice/not-a-constructor.js b/test/built-ins/SharedArrayBuffer/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..616bc0eb26
--- /dev/null
+++ b/test/built-ins/SharedArrayBuffer/prototype/slice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  SharedArrayBuffer.prototype.slice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, SharedArrayBuffer, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(SharedArrayBuffer.prototype.slice),
+  false,
+  'isConstructor(SharedArrayBuffer.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let sab = new SharedArrayBuffer(1); new sab.slice();
+}, '`let sab = new SharedArrayBuffer(1); new sab.slice()` throws TypeError');
+    
diff --git a/test/built-ins/String/fromCharCode/not-a-constructor.js b/test/built-ins/String/fromCharCode/not-a-constructor.js
new file mode 100644
index 0000000000..a8cb8b48ee
--- /dev/null
+++ b/test/built-ins/String/fromCharCode/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.fromCharCode does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.fromCharCode), false, 'isConstructor(String.fromCharCode) must return false');
+
+assert.throws(TypeError, () => {
+  new String.fromCharCode();
+}, '`new String.fromCharCode()` throws TypeError');
+    
diff --git a/test/built-ins/String/fromCodePoint/not-a-constructor.js b/test/built-ins/String/fromCodePoint/not-a-constructor.js
new file mode 100644
index 0000000000..368d4d1007
--- /dev/null
+++ b/test/built-ins/String/fromCodePoint/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.fromCodePoint does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.fromCodePoint), false, 'isConstructor(String.fromCodePoint) must return false');
+
+assert.throws(TypeError, () => {
+  new String.fromCodePoint();
+}, '`new String.fromCodePoint()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/Symbol.iterator/not-a-constructor.js b/test/built-ins/String/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..7cb4e8c4ee
--- /dev/null
+++ b/test/built-ins/String/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype[Symbol.iterator] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(String.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype[Symbol.iterator]();
+}, '`new String.prototype[Symbol.iterator]()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/charAt/not-a-constructor.js b/test/built-ins/String/prototype/charAt/not-a-constructor.js
new file mode 100644
index 0000000000..b21223e71a
--- /dev/null
+++ b/test/built-ins/String/prototype/charAt/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.charAt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.charAt),
+  false,
+  'isConstructor(String.prototype.charAt) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.charAt();
+}, '`new String.prototype.charAt()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/charCodeAt/not-a-constructor.js b/test/built-ins/String/prototype/charCodeAt/not-a-constructor.js
new file mode 100644
index 0000000000..14a54d57fb
--- /dev/null
+++ b/test/built-ins/String/prototype/charCodeAt/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.charCodeAt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.charCodeAt),
+  false,
+  'isConstructor(String.prototype.charCodeAt) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.charCodeAt();
+}, '`new String.prototype.charCodeAt()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/codePointAt/not-a-constructor.js b/test/built-ins/String/prototype/codePointAt/not-a-constructor.js
new file mode 100644
index 0000000000..9a0a56966c
--- /dev/null
+++ b/test/built-ins/String/prototype/codePointAt/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.codePointAt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.codePointAt),
+  false,
+  'isConstructor(String.prototype.codePointAt) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.codePointAt();
+}, '`new String.prototype.codePointAt()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/concat/not-a-constructor.js b/test/built-ins/String/prototype/concat/not-a-constructor.js
new file mode 100644
index 0000000000..236dbeb738
--- /dev/null
+++ b/test/built-ins/String/prototype/concat/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.concat does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.concat),
+  false,
+  'isConstructor(String.prototype.concat) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.concat();
+}, '`new String.prototype.concat()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/endsWith/not-a-constructor.js b/test/built-ins/String/prototype/endsWith/not-a-constructor.js
new file mode 100644
index 0000000000..0599d56526
--- /dev/null
+++ b/test/built-ins/String/prototype/endsWith/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.endsWith does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, String.prototype.endsWith, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.endsWith),
+  false,
+  'isConstructor(String.prototype.endsWith) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.endsWith();
+}, '`new String.prototype.endsWith()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/includes/not-a-constructor.js b/test/built-ins/String/prototype/includes/not-a-constructor.js
new file mode 100644
index 0000000000..5409d9020c
--- /dev/null
+++ b/test/built-ins/String/prototype/includes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.includes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.includes),
+  false,
+  'isConstructor(String.prototype.includes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.includes(1);
+}, '`new String.prototype.includes(1)` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/indexOf/not-a-constructor.js b/test/built-ins/String/prototype/indexOf/not-a-constructor.js
new file mode 100644
index 0000000000..5c52308256
--- /dev/null
+++ b/test/built-ins/String/prototype/indexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.indexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.indexOf),
+  false,
+  'isConstructor(String.prototype.indexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.indexOf();
+}, '`new String.prototype.indexOf()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/lastIndexOf/not-a-constructor.js b/test/built-ins/String/prototype/lastIndexOf/not-a-constructor.js
new file mode 100644
index 0000000000..2597640e6a
--- /dev/null
+++ b/test/built-ins/String/prototype/lastIndexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.lastIndexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.lastIndexOf),
+  false,
+  'isConstructor(String.prototype.lastIndexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.lastIndexOf();
+}, '`new String.prototype.lastIndexOf()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/localeCompare/not-a-constructor.js b/test/built-ins/String/prototype/localeCompare/not-a-constructor.js
new file mode 100644
index 0000000000..2d39418212
--- /dev/null
+++ b/test/built-ins/String/prototype/localeCompare/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.localeCompare does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.localeCompare),
+  false,
+  'isConstructor(String.prototype.localeCompare) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.localeCompare();
+}, '`new String.prototype.localeCompare()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/match/not-a-constructor.js b/test/built-ins/String/prototype/match/not-a-constructor.js
new file mode 100644
index 0000000000..627706fddd
--- /dev/null
+++ b/test/built-ins/String/prototype/match/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.match does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.match),
+  false,
+  'isConstructor(String.prototype.match) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.match();
+}, '`new String.prototype.match()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/matchAll/not-a-constructor.js b/test/built-ins/String/prototype/matchAll/not-a-constructor.js
new file mode 100644
index 0000000000..78169cd6d7
--- /dev/null
+++ b/test/built-ins/String/prototype/matchAll/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.matchAll does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, String.prototype.matchAll, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.matchAll),
+  false,
+  'isConstructor(String.prototype.matchAll) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.matchAll();
+}, '`new String.prototype.matchAll()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/normalize/not-a-constructor.js b/test/built-ins/String/prototype/normalize/not-a-constructor.js
new file mode 100644
index 0000000000..cb43168f01
--- /dev/null
+++ b/test/built-ins/String/prototype/normalize/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.normalize does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.normalize),
+  false,
+  'isConstructor(String.prototype.normalize) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.normalize();
+}, '`new String.prototype.normalize()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/padEnd/not-a-constructor.js b/test/built-ins/String/prototype/padEnd/not-a-constructor.js
new file mode 100644
index 0000000000..31eb29dbcb
--- /dev/null
+++ b/test/built-ins/String/prototype/padEnd/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.padEnd does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.padEnd),
+  false,
+  'isConstructor(String.prototype.padEnd) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.padEnd();
+}, '`new String.prototype.padEnd()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/padStart/not-a-constructor.js b/test/built-ins/String/prototype/padStart/not-a-constructor.js
new file mode 100644
index 0000000000..4cfb176e8d
--- /dev/null
+++ b/test/built-ins/String/prototype/padStart/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.padStart does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.padStart),
+  false,
+  'isConstructor(String.prototype.padStart) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.padStart();
+}, '`new String.prototype.padStart()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/repeat/not-a-constructor.js b/test/built-ins/String/prototype/repeat/not-a-constructor.js
new file mode 100644
index 0000000000..6ad404f2f1
--- /dev/null
+++ b/test/built-ins/String/prototype/repeat/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.repeat does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.repeat),
+  false,
+  'isConstructor(String.prototype.repeat) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.repeat();
+}, '`new String.prototype.repeat()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/replace/not-a-constructor.js b/test/built-ins/String/prototype/replace/not-a-constructor.js
new file mode 100644
index 0000000000..5880ee7ee6
--- /dev/null
+++ b/test/built-ins/String/prototype/replace/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.replace does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.replace),
+  false,
+  'isConstructor(String.prototype.replace) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.replace();
+}, '`new String.prototype.replace()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/replaceAll/not-a-constructor.js b/test/built-ins/String/prototype/replaceAll/not-a-constructor.js
new file mode 100644
index 0000000000..51443f416d
--- /dev/null
+++ b/test/built-ins/String/prototype/replaceAll/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.replaceAll does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.replaceAll),
+  false,
+  'isConstructor(String.prototype.replaceAll) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.replaceAll();
+}, '`new String.prototype.replaceAll()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/search/not-a-constructor.js b/test/built-ins/String/prototype/search/not-a-constructor.js
new file mode 100644
index 0000000000..f5c73a5c74
--- /dev/null
+++ b/test/built-ins/String/prototype/search/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.search does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.search),
+  false,
+  'isConstructor(String.prototype.search) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.search();
+}, '`new String.prototype.search()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/slice/not-a-constructor.js b/test/built-ins/String/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..0cf9569d5b
--- /dev/null
+++ b/test/built-ins/String/prototype/slice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.slice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.slice),
+  false,
+  'isConstructor(String.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.slice();
+}, '`new String.prototype.slice()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/split/not-a-constructor.js b/test/built-ins/String/prototype/split/not-a-constructor.js
new file mode 100644
index 0000000000..c60b20c666
--- /dev/null
+++ b/test/built-ins/String/prototype/split/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.split does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.split),
+  false,
+  'isConstructor(String.prototype.split) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.split();
+}, '`new String.prototype.split()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/startsWith/not-a-constructor.js b/test/built-ins/String/prototype/startsWith/not-a-constructor.js
new file mode 100644
index 0000000000..64f31aa037
--- /dev/null
+++ b/test/built-ins/String/prototype/startsWith/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.startsWith does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.startsWith),
+  false,
+  'isConstructor(String.prototype.startsWith) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.startsWith();
+}, '`new String.prototype.startsWith()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/substring/not-a-constructor.js b/test/built-ins/String/prototype/substring/not-a-constructor.js
new file mode 100644
index 0000000000..9819d567b7
--- /dev/null
+++ b/test/built-ins/String/prototype/substring/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.substring does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.substring),
+  false,
+  'isConstructor(String.prototype.substring) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.substring();
+}, '`new String.prototype.substring()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/toLocaleLowerCase/not-a-constructor.js b/test/built-ins/String/prototype/toLocaleLowerCase/not-a-constructor.js
new file mode 100644
index 0000000000..5037dd1678
--- /dev/null
+++ b/test/built-ins/String/prototype/toLocaleLowerCase/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.toLocaleLowerCase does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.toLocaleLowerCase),
+  false,
+  'isConstructor(String.prototype.toLocaleLowerCase) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.toLocaleLowerCase();
+}, '`new String.prototype.toLocaleLowerCase()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/toLocaleUpperCase/not-a-constructor.js b/test/built-ins/String/prototype/toLocaleUpperCase/not-a-constructor.js
new file mode 100644
index 0000000000..292495a415
--- /dev/null
+++ b/test/built-ins/String/prototype/toLocaleUpperCase/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.toLocaleUpperCase does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.toLocaleUpperCase),
+  false,
+  'isConstructor(String.prototype.toLocaleUpperCase) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.toLocaleUpperCase();
+}, '`new String.prototype.toLocaleUpperCase()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/toLowerCase/not-a-constructor.js b/test/built-ins/String/prototype/toLowerCase/not-a-constructor.js
new file mode 100644
index 0000000000..57a5ddc16b
--- /dev/null
+++ b/test/built-ins/String/prototype/toLowerCase/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.toLowerCase does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.toLowerCase),
+  false,
+  'isConstructor(String.prototype.toLowerCase) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.toLowerCase();
+}, '`new String.prototype.toLowerCase()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/toString/not-a-constructor.js b/test/built-ins/String/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..518e740934
--- /dev/null
+++ b/test/built-ins/String/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.toString),
+  false,
+  'isConstructor(String.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.toString();
+}, '`new String.prototype.toString()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/toUpperCase/not-a-constructor.js b/test/built-ins/String/prototype/toUpperCase/not-a-constructor.js
new file mode 100644
index 0000000000..de98916a69
--- /dev/null
+++ b/test/built-ins/String/prototype/toUpperCase/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.toUpperCase does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.toUpperCase),
+  false,
+  'isConstructor(String.prototype.toUpperCase) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.toUpperCase();
+}, '`new String.prototype.toUpperCase()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/trim/not-a-constructor.js b/test/built-ins/String/prototype/trim/not-a-constructor.js
new file mode 100644
index 0000000000..64895d417e
--- /dev/null
+++ b/test/built-ins/String/prototype/trim/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.trim does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.trim),
+  false,
+  'isConstructor(String.prototype.trim) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.trim();
+}, '`new String.prototype.trim()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/trimEnd/not-a-constructor.js b/test/built-ins/String/prototype/trimEnd/not-a-constructor.js
new file mode 100644
index 0000000000..0620d5bffa
--- /dev/null
+++ b/test/built-ins/String/prototype/trimEnd/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.trimEnd does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, string-trimming, String.prototype.trimEnd, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.trimEnd),
+  false,
+  'isConstructor(String.prototype.trimEnd) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.trimEnd();
+}, '`new String.prototype.trimEnd()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/trimStart/not-a-constructor.js b/test/built-ins/String/prototype/trimStart/not-a-constructor.js
new file mode 100644
index 0000000000..c81a16abc3
--- /dev/null
+++ b/test/built-ins/String/prototype/trimStart/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.trimStart does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, string-trimming, String.prototype.trimStart, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.trimStart),
+  false,
+  'isConstructor(String.prototype.trimStart) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.trimStart();
+}, '`new String.prototype.trimStart()` throws TypeError');
+    
diff --git a/test/built-ins/String/prototype/valueOf/not-a-constructor.js b/test/built-ins/String/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..49f5f91ac3
--- /dev/null
+++ b/test/built-ins/String/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(String.prototype.valueOf),
+  false,
+  'isConstructor(String.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new String.prototype.valueOf();
+}, '`new String.prototype.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/String/raw/not-a-constructor.js b/test/built-ins/String/raw/not-a-constructor.js
new file mode 100644
index 0000000000..02d34d037e
--- /dev/null
+++ b/test/built-ins/String/raw/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  String.raw does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(String.raw), false, 'isConstructor(String.raw) must return false');
+
+assert.throws(TypeError, () => {
+  new String.raw({raw: []}, []);
+}, '`new String.raw({raw: []}, [])` throws TypeError');
+    
diff --git a/test/built-ins/Symbol/for/not-a-constructor.js b/test/built-ins/Symbol/for/not-a-constructor.js
new file mode 100644
index 0000000000..415e98e3bf
--- /dev/null
+++ b/test/built-ins/Symbol/for/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Symbol.for does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Symbol.for), false, 'isConstructor(Symbol.for) must return false');
+
+assert.throws(TypeError, () => {
+  new Symbol.for();
+}, '`new Symbol.for()` throws TypeError');
+    
diff --git a/test/built-ins/Symbol/keyFor/not-a-constructor.js b/test/built-ins/Symbol/keyFor/not-a-constructor.js
new file mode 100644
index 0000000000..a74d45d8d4
--- /dev/null
+++ b/test/built-ins/Symbol/keyFor/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Symbol.keyFor does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Symbol.keyFor), false, 'isConstructor(Symbol.keyFor) must return false');
+
+assert.throws(TypeError, () => {
+  new Symbol.keyFor(Symbol());
+}, '`new Symbol.keyFor(Symbol())` throws TypeError');
+    
diff --git a/test/built-ins/Symbol/prototype/toString/not-a-constructor.js b/test/built-ins/Symbol/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..1473532e2c
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Symbol.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Symbol.prototype.toString),
+  false,
+  'isConstructor(Symbol.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let symbol = Symbol(); new symbol.toString();
+}, '`let symbol = Symbol(); new symbol.toString()` throws TypeError');
+    
diff --git a/test/built-ins/Symbol/prototype/valueOf/not-a-constructor.js b/test/built-ins/Symbol/prototype/valueOf/not-a-constructor.js
new file mode 100644
index 0000000000..4849c17761
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/valueOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Symbol.prototype.valueOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Symbol.prototype.valueOf),
+  false,
+  'isConstructor(Symbol.prototype.valueOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let symbol = Symbol(); new symbol.valueOf();
+}, '`let symbol = Symbol(); new symbol.valueOf()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/from/not-a-constructor.js b/test/built-ins/TypedArray/from/not-a-constructor.js
new file mode 100644
index 0000000000..b71a07444b
--- /dev/null
+++ b/test/built-ins/TypedArray/from/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.from does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(TypedArray.from), false, 'isConstructor(TypedArray.from) must return false');
+
+assert.throws(TypeError, () => {
+  new TypedArray.from([]);
+}, '`new TypedArray.from([])` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/of/not-a-constructor.js b/test/built-ins/TypedArray/of/not-a-constructor.js
new file mode 100644
index 0000000000..5787f8c92b
--- /dev/null
+++ b/test/built-ins/TypedArray/of/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.of does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(TypedArray.of), false, 'isConstructor(TypedArray.of) must return false');
+
+assert.throws(TypeError, () => {
+  new TypedArray.of(1, 2, 3, 4);
+}, '`new TypedArray.of(1, 2, 3, 4)` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/Symbol.iterator/not-a-constructor.js b/test/built-ins/TypedArray/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..21307f7909
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype[Symbol.iterator] does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(TypedArray.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8[Symbol.iterator]();
+}, '`let u8 = new Uint8Array(1); new u8[Symbol.iterator]()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/copyWithin/not-a-constructor.js b/test/built-ins/TypedArray/prototype/copyWithin/not-a-constructor.js
new file mode 100644
index 0000000000..c1dd022b7e
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/copyWithin/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.copyWithin does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.copyWithin),
+  false,
+  'isConstructor(TypedArray.prototype.copyWithin) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.copyWithin();
+}, '`let u8 = new Uint8Array(1); new u8.copyWithin()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/entries/not-a-constructor.js b/test/built-ins/TypedArray/prototype/entries/not-a-constructor.js
new file mode 100644
index 0000000000..bf72d93264
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/entries/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.entries does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.entries),
+  false,
+  'isConstructor(TypedArray.prototype.entries) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.entries();
+}, '`let u8 = new Uint8Array(1); new u8.entries()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/every/not-a-constructor.js b/test/built-ins/TypedArray/prototype/every/not-a-constructor.js
new file mode 100644
index 0000000000..9e4e591227
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/every/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.every does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.every),
+  false,
+  'isConstructor(TypedArray.prototype.every) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.every(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.every(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/fill/not-a-constructor.js b/test/built-ins/TypedArray/prototype/fill/not-a-constructor.js
new file mode 100644
index 0000000000..934fb7655a
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/fill/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.fill does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.fill),
+  false,
+  'isConstructor(TypedArray.prototype.fill) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.fill();
+}, '`let u8 = new Uint8Array(1); new u8.fill()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/filter/not-a-constructor.js b/test/built-ins/TypedArray/prototype/filter/not-a-constructor.js
new file mode 100644
index 0000000000..bedefb3e50
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/filter/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.filter does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.filter),
+  false,
+  'isConstructor(TypedArray.prototype.filter) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.filter(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.filter(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/find/not-a-constructor.js b/test/built-ins/TypedArray/prototype/find/not-a-constructor.js
new file mode 100644
index 0000000000..0254c25ede
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/find/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.find does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.find),
+  false,
+  'isConstructor(TypedArray.prototype.find) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.find(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.find(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/findIndex/not-a-constructor.js b/test/built-ins/TypedArray/prototype/findIndex/not-a-constructor.js
new file mode 100644
index 0000000000..db6e436783
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/findIndex/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.findIndex does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.findIndex),
+  false,
+  'isConstructor(TypedArray.prototype.findIndex) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.findIndex(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.findIndex(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/forEach/not-a-constructor.js b/test/built-ins/TypedArray/prototype/forEach/not-a-constructor.js
new file mode 100644
index 0000000000..b65d20b5a3
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/forEach/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.forEach does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.forEach),
+  false,
+  'isConstructor(TypedArray.prototype.forEach) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.forEach(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.forEach(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/includes/not-a-constructor.js b/test/built-ins/TypedArray/prototype/includes/not-a-constructor.js
new file mode 100644
index 0000000000..63e51be06f
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/includes/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.includes does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.includes),
+  false,
+  'isConstructor(TypedArray.prototype.includes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.includes(1);
+}, '`let u8 = new Uint8Array(1); new u8.includes(1)` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/indexOf/not-a-constructor.js b/test/built-ins/TypedArray/prototype/indexOf/not-a-constructor.js
new file mode 100644
index 0000000000..48ee2069ae
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/indexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.indexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.indexOf),
+  false,
+  'isConstructor(TypedArray.prototype.indexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.indexOf();
+}, '`let u8 = new Uint8Array(1); new u8.indexOf()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/join/not-a-constructor.js b/test/built-ins/TypedArray/prototype/join/not-a-constructor.js
new file mode 100644
index 0000000000..8037bef876
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/join/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.join does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.join),
+  false,
+  'isConstructor(TypedArray.prototype.join) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.join();
+}, '`let u8 = new Uint8Array(1); new u8.join()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/keys/not-a-constructor.js b/test/built-ins/TypedArray/prototype/keys/not-a-constructor.js
new file mode 100644
index 0000000000..bda4825bb4
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/keys/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.keys does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.keys),
+  false,
+  'isConstructor(TypedArray.prototype.keys) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.keys();
+}, '`let u8 = new Uint8Array(1); new u8.keys()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/lastIndexOf/not-a-constructor.js b/test/built-ins/TypedArray/prototype/lastIndexOf/not-a-constructor.js
new file mode 100644
index 0000000000..5b33448140
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/lastIndexOf/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.lastIndexOf does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.lastIndexOf),
+  false,
+  'isConstructor(TypedArray.prototype.lastIndexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.lastIndexOf();
+}, '`let u8 = new Uint8Array(1); new u8.lastIndexOf()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/map/not-a-constructor.js b/test/built-ins/TypedArray/prototype/map/not-a-constructor.js
new file mode 100644
index 0000000000..3366aecc6c
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/map/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.map does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.map),
+  false,
+  'isConstructor(TypedArray.prototype.map) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.map(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.map(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/reduce/not-a-constructor.js b/test/built-ins/TypedArray/prototype/reduce/not-a-constructor.js
new file mode 100644
index 0000000000..95ea768d82
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/reduce/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.reduce does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.reduce),
+  false,
+  'isConstructor(TypedArray.prototype.reduce) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.reduce(() => {}, []);
+}, '`let u8 = new Uint8Array(1); new u8.reduce(() => {}, [])` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/reduceRight/not-a-constructor.js b/test/built-ins/TypedArray/prototype/reduceRight/not-a-constructor.js
new file mode 100644
index 0000000000..dc4bc76cb6
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/reduceRight/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.reduceRight does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.reduceRight),
+  false,
+  'isConstructor(TypedArray.prototype.reduceRight) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.reduceRight(() => {}, []);
+}, '`let u8 = new Uint8Array(1); new u8.reduceRight(() => {}, [])` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/reverse/not-a-constructor.js b/test/built-ins/TypedArray/prototype/reverse/not-a-constructor.js
new file mode 100644
index 0000000000..6f75dd751f
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/reverse/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.reverse does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.reverse),
+  false,
+  'isConstructor(TypedArray.prototype.reverse) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.reverse();
+}, '`let u8 = new Uint8Array(1); new u8.reverse()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/set/not-a-constructor.js b/test/built-ins/TypedArray/prototype/set/not-a-constructor.js
new file mode 100644
index 0000000000..289ddc6733
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/set/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.set does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.set),
+  false,
+  'isConstructor(TypedArray.prototype.set) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.set([0], 0);
+}, '`let u8 = new Uint8Array(1); new u8.set([0], 0)` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/slice/not-a-constructor.js b/test/built-ins/TypedArray/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..a2907322c1
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/slice/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.slice does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.slice),
+  false,
+  'isConstructor(TypedArray.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.slice();
+}, '`let u8 = new Uint8Array(1); new u8.slice()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/some/not-a-constructor.js b/test/built-ins/TypedArray/prototype/some/not-a-constructor.js
new file mode 100644
index 0000000000..e9bfe385f7
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/some/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.some does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.some),
+  false,
+  'isConstructor(TypedArray.prototype.some) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.some(() => {});
+}, '`let u8 = new Uint8Array(1); new u8.some(() => {})` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/sort/not-a-constructor.js b/test/built-ins/TypedArray/prototype/sort/not-a-constructor.js
new file mode 100644
index 0000000000..0ef4408710
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/sort/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.sort does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.sort),
+  false,
+  'isConstructor(TypedArray.prototype.sort) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.sort();
+}, '`let u8 = new Uint8Array(1); new u8.sort()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/subarray/not-a-constructor.js b/test/built-ins/TypedArray/prototype/subarray/not-a-constructor.js
new file mode 100644
index 0000000000..1a75b2d18d
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/subarray/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.subarray does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.subarray),
+  false,
+  'isConstructor(TypedArray.prototype.subarray) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.subarray();
+}, '`let u8 = new Uint8Array(1); new u8.subarray()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/toLocaleString/not-a-constructor.js b/test/built-ins/TypedArray/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..3de2607fa0
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.toLocaleString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.toLocaleString),
+  false,
+  'isConstructor(TypedArray.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.toLocaleString();
+}, '`let u8 = new Uint8Array(1); new u8.toLocaleString()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/toString/not-a-constructor.js b/test/built-ins/TypedArray/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..c2f63f75e3
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/toString/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.toString does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.toString),
+  false,
+  'isConstructor(TypedArray.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.toString();
+}, '`let u8 = new Uint8Array(1); new u8.toString()` throws TypeError');
+    
diff --git a/test/built-ins/TypedArray/prototype/values/not-a-constructor.js b/test/built-ins/TypedArray/prototype/values/not-a-constructor.js
new file mode 100644
index 0000000000..85afc41980
--- /dev/null
+++ b/test/built-ins/TypedArray/prototype/values/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  TypedArray.prototype.values does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js, testTypedArray.js]
+features: [Reflect.construct, arrow-function, TypedArray]
+---*/
+
+assert.sameValue(
+  isConstructor(TypedArray.prototype.values),
+  false,
+  'isConstructor(TypedArray.prototype.values) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let u8 = new Uint8Array(1); new u8.values();
+}, '`let u8 = new Uint8Array(1); new u8.values()` throws TypeError');
+    
diff --git a/test/built-ins/WeakMap/prototype/delete/not-a-constructor.js b/test/built-ins/WeakMap/prototype/delete/not-a-constructor.js
new file mode 100644
index 0000000000..f9bb6bffaf
--- /dev/null
+++ b/test/built-ins/WeakMap/prototype/delete/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakMap.prototype.delete does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakMap.prototype.delete),
+  false,
+  'isConstructor(WeakMap.prototype.delete) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let wm = new WeakMap(); new wm.delete();
+}, '`let wm = new WeakMap(); new wm.delete()` throws TypeError');
+    
diff --git a/test/built-ins/WeakMap/prototype/get/not-a-constructor.js b/test/built-ins/WeakMap/prototype/get/not-a-constructor.js
new file mode 100644
index 0000000000..ff422bd9fd
--- /dev/null
+++ b/test/built-ins/WeakMap/prototype/get/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakMap.prototype.get does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakMap.prototype.get),
+  false,
+  'isConstructor(WeakMap.prototype.get) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let wm = new WeakMap(); new wm.get();
+}, '`let wm = new WeakMap(); new wm.get()` throws TypeError');
+    
diff --git a/test/built-ins/WeakMap/prototype/has/not-a-constructor.js b/test/built-ins/WeakMap/prototype/has/not-a-constructor.js
new file mode 100644
index 0000000000..4b9bb88312
--- /dev/null
+++ b/test/built-ins/WeakMap/prototype/has/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakMap.prototype.has does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakMap.prototype.has),
+  false,
+  'isConstructor(WeakMap.prototype.has) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let wm = new WeakMap(); new wm.has();
+}, '`let wm = new WeakMap(); new wm.has()` throws TypeError');
+    
diff --git a/test/built-ins/WeakMap/prototype/set/not-a-constructor.js b/test/built-ins/WeakMap/prototype/set/not-a-constructor.js
new file mode 100644
index 0000000000..5241b815e8
--- /dev/null
+++ b/test/built-ins/WeakMap/prototype/set/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakMap.prototype.set does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakMap.prototype.set),
+  false,
+  'isConstructor(WeakMap.prototype.set) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let wm = new WeakMap(); new wm.set({}, 1);
+}, '`let wm = new WeakMap(); new wm.set({}, 1)` throws TypeError');
+    
diff --git a/test/built-ins/WeakRef/prototype/deref/not-a-constructor.js b/test/built-ins/WeakRef/prototype/deref/not-a-constructor.js
new file mode 100644
index 0000000000..161baea529
--- /dev/null
+++ b/test/built-ins/WeakRef/prototype/deref/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakRef.prototype.deref does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakRef, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakRef.prototype.deref),
+  false,
+  'isConstructor(WeakRef.prototype.deref) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let wr = new WeakRef({}); new wr.deref();
+}, '`let wr = new WeakRef({}); new wr.deref()` throws TypeError');
+    
diff --git a/test/built-ins/WeakSet/prototype/add/not-a-constructor.js b/test/built-ins/WeakSet/prototype/add/not-a-constructor.js
new file mode 100644
index 0000000000..4e24303e0b
--- /dev/null
+++ b/test/built-ins/WeakSet/prototype/add/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakSet.prototype.add does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakSet, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakSet.prototype.add),
+  false,
+  'isConstructor(WeakSet.prototype.add) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let ws = new WeakSet(); new ws.add({});
+}, '`let ws = new WeakSet(); new ws.add({})` throws TypeError');
+    
diff --git a/test/built-ins/WeakSet/prototype/delete/not-a-constructor.js b/test/built-ins/WeakSet/prototype/delete/not-a-constructor.js
new file mode 100644
index 0000000000..55d5af7693
--- /dev/null
+++ b/test/built-ins/WeakSet/prototype/delete/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakSet.prototype.delete does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakSet, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakSet.prototype.delete),
+  false,
+  'isConstructor(WeakSet.prototype.delete) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let ws = new WeakSet(); new ws.delete();
+}, '`let ws = new WeakSet(); new ws.delete()` throws TypeError');
+    
diff --git a/test/built-ins/WeakSet/prototype/has/not-a-constructor.js b/test/built-ins/WeakSet/prototype/has/not-a-constructor.js
new file mode 100644
index 0000000000..86b5f01d5e
--- /dev/null
+++ b/test/built-ins/WeakSet/prototype/has/not-a-constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  WeakSet.prototype.has); does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, WeakSet, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(WeakSet.prototype.has),
+  false,
+  'isConstructor(WeakSet.prototype.has) must return false'
+);
+
+assert.throws(TypeError, () => {
+  let ws = new WeakSet(); new ws.has();
+}, '`let ws = new WeakSet(); new ws.has()` throws TypeError');
+    
diff --git a/test/built-ins/decodeURI/not-a-constructor.js b/test/built-ins/decodeURI/not-a-constructor.js
new file mode 100644
index 0000000000..06bab4d6c7
--- /dev/null
+++ b/test/built-ins/decodeURI/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  decodeURI does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(decodeURI), false, 'isConstructor(decodeURI) must return false');
+
+assert.throws(TypeError, () => {
+  new decodeURI('');
+}, '`new decodeURI(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/decodeURIComponent/not-a-constructor.js b/test/built-ins/decodeURIComponent/not-a-constructor.js
new file mode 100644
index 0000000000..2eab6419c0
--- /dev/null
+++ b/test/built-ins/decodeURIComponent/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  decodeURIComponent does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(decodeURIComponent), false, 'isConstructor(decodeURIComponent) must return false');
+
+assert.throws(TypeError, () => {
+  new decodeURIComponent('');
+}, '`new decodeURIComponent(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/encodeURI/not-a-constructor.js b/test/built-ins/encodeURI/not-a-constructor.js
new file mode 100644
index 0000000000..bb8b5baf97
--- /dev/null
+++ b/test/built-ins/encodeURI/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  encodeURI does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(encodeURI), false, 'isConstructor(encodeURI) must return false');
+
+assert.throws(TypeError, () => {
+  new encodeURI('');
+}, '`new encodeURI(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/encodeURIComponent/not-a-constructor.js b/test/built-ins/encodeURIComponent/not-a-constructor.js
new file mode 100644
index 0000000000..54dd2014b2
--- /dev/null
+++ b/test/built-ins/encodeURIComponent/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  encodeURIComponent does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(encodeURIComponent), false, 'isConstructor(encodeURIComponent) must return false');
+
+assert.throws(TypeError, () => {
+  new encodeURIComponent('');
+}, '`new encodeURIComponent(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/eval/not-a-constructor.js b/test/built-ins/eval/not-a-constructor.js
new file mode 100644
index 0000000000..b79c1e960d
--- /dev/null
+++ b/test/built-ins/eval/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  eval does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(eval), false, 'isConstructor(eval) must return false');
+
+assert.throws(TypeError, () => {
+  new eval('');
+}, '`new eval(\'\')` throws TypeError');
+    
diff --git a/test/built-ins/isFinite/not-a-constructor.js b/test/built-ins/isFinite/not-a-constructor.js
new file mode 100644
index 0000000000..ae4c73b0fd
--- /dev/null
+++ b/test/built-ins/isFinite/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  isFinite does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(isFinite), false, 'isConstructor(isFinite) must return false');
+
+assert.throws(TypeError, () => {
+  new isFinite(1);
+}, '`new isFinite(1)` throws TypeError');
+    
diff --git a/test/built-ins/isNaN/not-a-constructor.js b/test/built-ins/isNaN/not-a-constructor.js
new file mode 100644
index 0000000000..e794d7db62
--- /dev/null
+++ b/test/built-ins/isNaN/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  isNaN does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(isNaN), false, 'isConstructor(isNaN) must return false');
+
+assert.throws(TypeError, () => {
+  new isNaN(1);
+}, '`new isNaN(1)` throws TypeError');
+    
diff --git a/test/built-ins/parseFloat/not-a-constructor.js b/test/built-ins/parseFloat/not-a-constructor.js
new file mode 100644
index 0000000000..2168e1b374
--- /dev/null
+++ b/test/built-ins/parseFloat/not-a-constructor.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  parseFloat does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(parseFloat), false, 'isConstructor(parseFloat) must return false');
+
+assert.throws(TypeError, () => {
+  new parseFloat(1);
+}, '`new parseFloat(1)` throws TypeError');
+    
diff --git a/test/built-ins/parseInt/not-a-constructor.js b/test/built-ins/parseInt/not-a-constructor.js
index 37c06a8a8a..35d500e8e6 100644
--- a/test/built-ins/parseInt/not-a-constructor.js
+++ b/test/built-ins/parseInt/not-a-constructor.js
@@ -1,14 +1,23 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-info: The parseInt property can't be used as constructor
-esid: sec-parseint-string-radix
+esid: sec-ecmascript-standard-built-in-objects
 description: >
-    If property does not implement the internal [[Construct]] method,
-    throw a TypeError exception
+  parseInt does not implement [[Construct]]
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
 ---*/
 
+assert.sameValue(isConstructor(parseInt), false, 'isConstructor(parseInt) must return false');
+
 assert.throws(TypeError, () => {
-  new parseInt();
-}, '`new parseInt()` throws TypeError');
+  new parseInt(1);
+}, '`new parseInt(1)` throws TypeError');
+