diff --git a/test/harness/assert-false.js b/test/harness/assert-false.js
index 93b8205813..0c8f175d91 100644
--- a/test/harness/assert-false.js
+++ b/test/harness/assert-false.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     `false` does not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-notsamevalue-nan.js b/test/harness/assert-notsamevalue-nan.js
index 856cc482c7..5b784150cd 100644
--- a/test/harness/assert-notsamevalue-nan.js
+++ b/test/harness/assert-notsamevalue-nan.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     Two references to NaN do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-obj.js b/test/harness/assert-obj.js
index edaf82fc69..2b934a3b85 100644
--- a/test/harness/assert-obj.js
+++ b/test/harness/assert-obj.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     An object literal does not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-samevalue-objects.js b/test/harness/assert-samevalue-objects.js
index 833f864b4d..03c0d80ba4 100644
--- a/test/harness/assert-samevalue-objects.js
+++ b/test/harness/assert-samevalue-objects.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     Distinct objects do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-samevalue-zeros.js b/test/harness/assert-samevalue-zeros.js
index a4a44a031d..461b93e8ef 100644
--- a/test/harness/assert-samevalue-zeros.js
+++ b/test/harness/assert-samevalue-zeros.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     Positive and negative zero do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-early-not-early.js b/test/harness/assert-throws-early-not-early.js
index b9774492dc..f7b721fe61 100644
--- a/test/harness/assert-throws-early-not-early.js
+++ b/test/harness/assert-throws-early-not-early.js
@@ -4,13 +4,8 @@
 /*---
 description: >
     The assertion fails when the code does not parse with an early error
+includes: [sta.js]
 ---*/
-
-// monkeypatch the API
-$ERROR = function $ERROR(message) {
-  throw new Test262Error(message);
-};
-
 assert.throws(Test262Error, () => {
   assert.throws.early(ReferenceError, 'x = 1');
 });
diff --git a/test/harness/assert-throws-incorrect-ctor.js b/test/harness/assert-throws-incorrect-ctor.js
index b12f06ee77..5384bec0b2 100644
--- a/test/harness/assert-throws-incorrect-ctor.js
+++ b/test/harness/assert-throws-incorrect-ctor.js
@@ -5,6 +5,7 @@
 description: >
   Functions that throw values whose constructor does not match the specified
   constructor do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-native.js b/test/harness/assert-throws-native.js
index 7650acb19e..6c03b50fa6 100644
--- a/test/harness/assert-throws-native.js
+++ b/test/harness/assert-throws-native.js
@@ -5,6 +5,7 @@
 description: >
     Functions that throw instances of the specified native Error constructor
     satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 assert.throws(Error, function() {
diff --git a/test/harness/assert-throws-no-arg.js b/test/harness/assert-throws-no-arg.js
index c8a9f3510b..1d37975834 100644
--- a/test/harness/assert-throws-no-arg.js
+++ b/test/harness/assert-throws-no-arg.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     The assertion fails when invoked without arguments.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-no-error.js b/test/harness/assert-throws-no-error.js
index d40b06b44c..5b7cfda1de 100644
--- a/test/harness/assert-throws-no-error.js
+++ b/test/harness/assert-throws-no-error.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     Functions that do not throw errors do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-null-fn.js b/test/harness/assert-throws-null-fn.js
index 741751498a..8d974da64d 100644
--- a/test/harness/assert-throws-null-fn.js
+++ b/test/harness/assert-throws-null-fn.js
@@ -4,6 +4,7 @@
 /*---
 description: >
   Fails if second arg is not a function
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-null.js b/test/harness/assert-throws-null.js
index 7b10f61247..227b83ab4e 100644
--- a/test/harness/assert-throws-null.js
+++ b/test/harness/assert-throws-null.js
@@ -4,6 +4,7 @@
 /*---
 description: >
     Functions that throw the `null` value do not satisfy the assertion.
+includes: [sta.js]
 ---*/
 
 var threw = false;
diff --git a/test/harness/assert-throws-primitive.js b/test/harness/assert-throws-primitive.js
index f1f86e18e0..9550961793 100644
--- a/test/harness/assert-throws-primitive.js
+++ b/test/harness/assert-throws-primitive.js
@@ -4,8 +4,8 @@
 /*---
 description: >
     Functions that throw primitive values do not satisfy the assertion.
+includes: [sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/assert-throws-single-arg.js b/test/harness/assert-throws-single-arg.js
index 3606a1608d..ab10128603 100644
--- a/test/harness/assert-throws-single-arg.js
+++ b/test/harness/assert-throws-single-arg.js
@@ -4,8 +4,8 @@
 /*---
 description: >
     The assertion fails when invoked with a single argument.
+includes: [sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/assertRelativeDateMs.js b/test/harness/assertRelativeDateMs.js
index c8c08b3b67..77022f0747 100644
--- a/test/harness/assertRelativeDateMs.js
+++ b/test/harness/assertRelativeDateMs.js
@@ -4,7 +4,7 @@
 description: >
      Only passes when the provided date is exactly the specified number of
      milliseconds from the Unix epoch
-includes: [assertRelativeDateMs.js]
+includes: [assertRelativeDateMs.js,sta.js]
 ---*/
 
 var thrown;
diff --git a/test/harness/error.js b/test/harness/error.js
index e6cee574f6..36463225c5 100644
--- a/test/harness/error.js
+++ b/test/harness/error.js
@@ -3,10 +3,10 @@
 
 /*---
 description: >
-    The global `$ERROR` function throws an instance of the global `Test262`
+    The global `$ERROR` function throws an instance of the global `Test262Error`
     function with the specified message.
+includes: [sta.js]
 ---*/
-
 var threw = false;
 
 try {
@@ -25,5 +25,5 @@ try {
 }
 
 if (threw === false) {
-  throw new Error('Expected a Test262Error, but no error was thrown.');
+  $ERROR('Expected a Test262Error, but no error was thrown.');
 }
diff --git a/test/harness/propertyhelper-verifyconfigurable-not-configurable-not-strict.js b/test/harness/propertyhelper-verifyconfigurable-not-configurable-not-strict.js
index e8216b2329..e84182d79a 100644
--- a/test/harness/propertyhelper-verifyconfigurable-not-configurable-not-strict.js
+++ b/test/harness/propertyhelper-verifyconfigurable-not-configurable-not-strict.js
@@ -5,7 +5,7 @@
 description: >
     Objects whose specified property is not configurable do not satisfy the
     assertion outside of strict mode.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 flags: [noStrict]
 ---*/
 
diff --git a/test/harness/propertyhelper-verifyconfigurable-not-configurable-strict.js b/test/harness/propertyhelper-verifyconfigurable-not-configurable-strict.js
index ce438f50fa..23f05344bf 100644
--- a/test/harness/propertyhelper-verifyconfigurable-not-configurable-strict.js
+++ b/test/harness/propertyhelper-verifyconfigurable-not-configurable-strict.js
@@ -5,10 +5,9 @@
 description: >
     Objects whose specified property is not configurable do not satisfy the
     assertion in strict mode.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 flags: [onlyStrict]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifyenumerable-not-enumerable-symbol.js b/test/harness/propertyhelper-verifyenumerable-not-enumerable-symbol.js
index 6968ca896d..5079502e72 100644
--- a/test/harness/propertyhelper-verifyenumerable-not-enumerable-symbol.js
+++ b/test/harness/propertyhelper-verifyenumerable-not-enumerable-symbol.js
@@ -5,10 +5,9 @@
 description: |
     Objects whose specified symbol property is not enumerable do not satisfy the
     assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 features: [Symbol]
 ---*/
-
 var threw = false;
 var obj = {};
 var s = Symbol('1');
@@ -29,7 +28,5 @@ try {
 }
 
 if (threw === false) {
-  throw new Test262Error(
-    'Expected a Test262Error, but no error was thrown for symbol key.'
-  );
+  $ERROR('Expected a Test262Error, but no error was thrown.');
 }
diff --git a/test/harness/propertyhelper-verifyenumerable-not-enumerable.js b/test/harness/propertyhelper-verifyenumerable-not-enumerable.js
index b6ff01410c..861592a9a4 100644
--- a/test/harness/propertyhelper-verifyenumerable-not-enumerable.js
+++ b/test/harness/propertyhelper-verifyenumerable-not-enumerable.js
@@ -5,9 +5,8 @@
 description: |
     Objects whose specified string property is not enumerable do not satisfy the
     assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
@@ -27,7 +26,5 @@ try {
 }
 
 if (threw === false) {
-  throw new Test262Error(
-    'Expected a Test262Error, but no error was thrown for string key.'
-  );
+  $ERROR('Expected a Test262Error, but no error was thrown.');
 }
diff --git a/test/harness/propertyhelper-verifynotconfigurable-configurable.js b/test/harness/propertyhelper-verifynotconfigurable-configurable.js
index 4b66a9b12a..6c8bb5af2d 100644
--- a/test/harness/propertyhelper-verifynotconfigurable-configurable.js
+++ b/test/harness/propertyhelper-verifynotconfigurable-configurable.js
@@ -5,9 +5,8 @@
 description: >
     Objects whose specified property is configurable do not satisfy the
     assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifynotconfigurable-not-configurable-strict.js b/test/harness/propertyhelper-verifynotconfigurable-not-configurable-strict.js
index b551076365..56f82b31fa 100644
--- a/test/harness/propertyhelper-verifynotconfigurable-not-configurable-strict.js
+++ b/test/harness/propertyhelper-verifynotconfigurable-not-configurable-strict.js
@@ -5,10 +5,9 @@
 description: >
     Objects whose specified property is not configurable satisfy the assertion
     in strict mode.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 flags: [onlyStrict]
 ---*/
-
 var obj = {};
 Object.defineProperty(obj, 'a', {
   configurable: false
diff --git a/test/harness/propertyhelper-verifynotenumerable-enumerable-symbol.js b/test/harness/propertyhelper-verifynotenumerable-enumerable-symbol.js
index 220c4f79c5..80e4ed4286 100644
--- a/test/harness/propertyhelper-verifynotenumerable-enumerable-symbol.js
+++ b/test/harness/propertyhelper-verifynotenumerable-enumerable-symbol.js
@@ -5,10 +5,9 @@
 description: |
     Objects whose specified symbol property is enumerable do not satisfy the
     assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 features: [Symbol]
 ---*/
-
 var threw = false;
 var obj = {};
 var s = Symbol('1');
diff --git a/test/harness/propertyhelper-verifynotenumerable-enumerable.js b/test/harness/propertyhelper-verifynotenumerable-enumerable.js
index 5a9b136870..b22a91c71d 100644
--- a/test/harness/propertyhelper-verifynotenumerable-enumerable.js
+++ b/test/harness/propertyhelper-verifynotenumerable-enumerable.js
@@ -5,9 +5,8 @@
 description: |
     Objects whose specified string property is enumerable do not satisfy the
     assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifynotwritable-writable.js b/test/harness/propertyhelper-verifynotwritable-writable.js
index 8eb1b75fb7..eb851add34 100644
--- a/test/harness/propertyhelper-verifynotwritable-writable.js
+++ b/test/harness/propertyhelper-verifynotwritable-writable.js
@@ -4,9 +4,8 @@
 /*---
 description: >
     Objects whose specified property is writable do not satisfy the assertion.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifywritable-not-writable-not-strict.js b/test/harness/propertyhelper-verifywritable-not-writable-not-strict.js
index bae8fec16d..591aabaa56 100644
--- a/test/harness/propertyhelper-verifywritable-not-writable-not-strict.js
+++ b/test/harness/propertyhelper-verifywritable-not-writable-not-strict.js
@@ -5,10 +5,9 @@
 description: >
     Objects whose specified property is not writable do not satisfy the
     assertion outside of strict mode.
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 flags: [noStrict]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifywritable-not-writable-strict.js b/test/harness/propertyhelper-verifywritable-not-writable-strict.js
index 85b3046c60..da60196ef6 100644
--- a/test/harness/propertyhelper-verifywritable-not-writable-strict.js
+++ b/test/harness/propertyhelper-verifywritable-not-writable-strict.js
@@ -5,9 +5,10 @@
 description: >
     Objects whose specified property is not writable do not satisfy the
     assertion in strict mode.
-includes: [propertyHelper.js]
----*/
 
+includes: [propertyHelper.js,sta.js]
+flags: [onlyStrict]
+---*/
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/propertyhelper-verifywritable-writable.js b/test/harness/propertyhelper-verifywritable-writable.js
index 5dc13e8c04..884b7a8dfb 100644
--- a/test/harness/propertyhelper-verifywritable-writable.js
+++ b/test/harness/propertyhelper-verifywritable-writable.js
@@ -6,7 +6,6 @@ description: >
     Objects whose specified property is writable satisfy the assertion.
 includes: [propertyHelper.js]
 ---*/
-
 var obj = {};
 
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/testbuiltinobject-function-badstring.js b/test/harness/testbuiltinobject-function-badstring.js
index 5b7a4cba6c..7340fdad39 100644
--- a/test/harness/testbuiltinobject-function-badstring.js
+++ b/test/harness/testbuiltinobject-function-badstring.js
@@ -5,9 +5,8 @@
 description: >
     Objects that are expected to be functions but do not define the correct
     [[Class]] internal property do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/testbuiltinobject-function-expected-length.js b/test/harness/testbuiltinobject-function-expected-length.js
index cc69d94ddf..1503384bd1 100644
--- a/test/harness/testbuiltinobject-function-expected-length.js
+++ b/test/harness/testbuiltinobject-function-expected-length.js
@@ -5,9 +5,8 @@
 description: >
     Functions whose `length` property does not match the expected value do not
     satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/testbuiltinobject-function-not-constructor-no-error.js b/test/harness/testbuiltinobject-function-not-constructor-no-error.js
index e3b9f73e34..a33597184f 100644
--- a/test/harness/testbuiltinobject-function-not-constructor-no-error.js
+++ b/test/harness/testbuiltinobject-function-not-constructor-no-error.js
@@ -5,9 +5,8 @@
 description: >
     Non-constructor functions that do not throw an when invoked via `new` do
     not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/testbuiltinobject-function-not-constructor-no-typeerror.js b/test/harness/testbuiltinobject-function-not-constructor-no-typeerror.js
index 4a72bf34f2..10720ad1ab 100644
--- a/test/harness/testbuiltinobject-function-not-constructor-no-typeerror.js
+++ b/test/harness/testbuiltinobject-function-not-constructor-no-typeerror.js
@@ -5,9 +5,8 @@
 description: >
     Non-constructor functions that do not throw a TypeError when invoked via
     `new` do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var fn = function() {
   throw new Error();
diff --git a/test/harness/testbuiltinobject-non-extensible.js b/test/harness/testbuiltinobject-non-extensible.js
index 5d43f711d6..7e1565cb80 100644
--- a/test/harness/testbuiltinobject-non-extensible.js
+++ b/test/harness/testbuiltinobject-non-extensible.js
@@ -4,9 +4,8 @@
 /*---
 description: >
     Objects that are not extensible  do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.preventExtensions(obj);
diff --git a/test/harness/testbuiltinobject-not-function-badstring.js b/test/harness/testbuiltinobject-not-function-badstring.js
index 9d0e69c95e..00223284c0 100644
--- a/test/harness/testbuiltinobject-not-function-badstring.js
+++ b/test/harness/testbuiltinobject-not-function-badstring.js
@@ -5,9 +5,8 @@
 description: >
     Objects that are not expected to be functions but do not define the correct
     [[Class]] internal property do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/testbuiltinobject-prop-enumerable.js b/test/harness/testbuiltinobject-prop-enumerable.js
index fda5a1abd1..fdceb54877 100644
--- a/test/harness/testbuiltinobject-prop-enumerable.js
+++ b/test/harness/testbuiltinobject-prop-enumerable.js
@@ -5,9 +5,8 @@
 description: >
     Objects that do not define all of the specified "own" properties as
     non-enumerable do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/testbuiltinobject-prop-missing.js b/test/harness/testbuiltinobject-prop-missing.js
index bfad8336e5..f27ab008f7 100644
--- a/test/harness/testbuiltinobject-prop-missing.js
+++ b/test/harness/testbuiltinobject-prop-missing.js
@@ -5,9 +5,8 @@
 description: >
     Objects that do not define all of the specified "own" properties do not
     satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/testbuiltinobject-prop-not-configurable.js b/test/harness/testbuiltinobject-prop-not-configurable.js
index 661e344675..9ad2c8d610 100644
--- a/test/harness/testbuiltinobject-prop-not-configurable.js
+++ b/test/harness/testbuiltinobject-prop-not-configurable.js
@@ -5,9 +5,8 @@
 description: >
     Objects that do not define all of the specified "own" properties as
     configurable do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/testbuiltinobject-prop-not-writable.js b/test/harness/testbuiltinobject-prop-not-writable.js
index 7f2ba95daa..af816a2700 100644
--- a/test/harness/testbuiltinobject-prop-not-writable.js
+++ b/test/harness/testbuiltinobject-prop-not-writable.js
@@ -5,9 +5,8 @@
 description: >
     Objects that do not define all of the specified "own" properties as
     writable do not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 var obj = {};
 Object.defineProperty(obj, 'a', {
diff --git a/test/harness/testbuiltinobject-undefined.js b/test/harness/testbuiltinobject-undefined.js
index ffab8c7ed1..408ea6942d 100644
--- a/test/harness/testbuiltinobject-undefined.js
+++ b/test/harness/testbuiltinobject-undefined.js
@@ -4,9 +4,8 @@
 /*---
 description: >
     `undefined` does not satisfy the assertion.
-includes: [testBuiltInObject.js]
+includes: [testBuiltInObject.js,sta.js]
 ---*/
-
 var threw = false;
 
 try {
diff --git a/test/harness/verifyProperty-arguments.js b/test/harness/verifyProperty-arguments.js
index 9c2c9faaec..37c9ed3ad8 100644
--- a/test/harness/verifyProperty-arguments.js
+++ b/test/harness/verifyProperty-arguments.js
@@ -4,14 +4,8 @@
 /*---
 description: >
   verifyProperty should receive at least 3 arguments: obj, name, and descriptor
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
-// monkeypatch the API
-$ERROR = function $ERROR(message) {
-  throw new Test262Error(message);
-};
-
 assert.throws(Test262Error, () => {
   verifyProperty();
 }, "0 arguments");
diff --git a/test/harness/verifyProperty-desc-is-not-object.js b/test/harness/verifyProperty-desc-is-not-object.js
index 6df9700a97..418c2893f5 100644
--- a/test/harness/verifyProperty-desc-is-not-object.js
+++ b/test/harness/verifyProperty-desc-is-not-object.js
@@ -4,14 +4,8 @@
 /*---
 description: >
   The desc argument should be an object or undefined
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
-// monkeypatch the API
-$ERROR = function $ERROR(message) {
-  throw new Test262Error(message);
-};
-
 var sample = { foo: 42 };
 
 assert.throws(Test262Error, () => {
diff --git a/test/harness/verifyProperty-noproperty.js b/test/harness/verifyProperty-noproperty.js
index bc63830675..aec783cc5a 100644
--- a/test/harness/verifyProperty-noproperty.js
+++ b/test/harness/verifyProperty-noproperty.js
@@ -4,14 +4,8 @@
 /*---
 description: >
   The first argument should have an own property
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
-// monkeypatch the API
-$ERROR = function $ERROR(message) {
-  throw new Test262Error(message);
-};
-
 assert.throws(Test262Error, () => {
   verifyProperty(Object, 'JeanPaulSartre', {});
 }, "inexisting property");
diff --git a/test/harness/verifyProperty-undefined-desc.js b/test/harness/verifyProperty-undefined-desc.js
index 315061666d..590fd62892 100644
--- a/test/harness/verifyProperty-undefined-desc.js
+++ b/test/harness/verifyProperty-undefined-desc.js
@@ -4,14 +4,8 @@
 /*---
 description: >
   Verify an undefined descriptor
-includes: [propertyHelper.js]
+includes: [propertyHelper.js,sta.js]
 ---*/
-
-// monkeypatch the API
-$ERROR = function $ERROR(message) {
-  throw new Test262Error(message);
-};
-
 var sample = {
   bar: undefined,
   get baz() {}