diff --git a/test/built-ins/BigInt/infinity-throws-rangeerror.js b/test/built-ins/BigInt/infinity-throws-rangeerror.js
new file mode 100644
index 0000000000..4636997ec5
--- /dev/null
+++ b/test/built-ins/BigInt/infinity-throws-rangeerror.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt throws a RangeError if value is Infinity
+esid: sec-bigint-constructor
+info: |
+  BigInt ( value )
+
+  ...
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+  ...
+
+  NumberToBigInt ( number )
+
+  ...
+  2. If IsSafeInteger(number) is false, throw a RangeError exception.
+  ...
+
+  IsSafeInteger ( number )
+
+  ...
+  2. If number is NaN, +∞, or -∞, return false.
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  BigInt(Infinity);
+});
+
+var calls = 0;
+var obj = {
+  valueOf: function() {
+    calls++;
+    return Infinity;
+  }
+}
+assert.throws(RangeError, function() {
+  BigInt(obj);
+});
+assert.sameValue(calls, 1, "it fails after fetching the primitive value");
diff --git a/test/built-ins/BigInt/nan-throws-rangeerror.js b/test/built-ins/BigInt/nan-throws-rangeerror.js
new file mode 100644
index 0000000000..3ca48bafcf
--- /dev/null
+++ b/test/built-ins/BigInt/nan-throws-rangeerror.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt throws a RangeError if value is NaN
+esid: sec-bigint-constructor
+info: |
+  BigInt ( value )
+
+  ...
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+  ...
+
+  NumberToBigInt ( number )
+
+  ...
+  2. If IsSafeInteger(number) is false, throw a RangeError exception.
+  ...
+
+  IsSafeInteger ( number )
+
+  ...
+  2. If number is NaN, +∞, or -∞, return false.
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  BigInt(NaN);
+});
+
+var calls = 0;
+var obj = {
+  valueOf: function() {
+    calls++;
+    return NaN;
+  }
+}
+assert.throws(RangeError, function() {
+  BigInt(obj);
+});
+assert.sameValue(calls, 1, "it fails after fetching the primitive value");
diff --git a/test/built-ins/BigInt/negative-infinity-throws.rangeerror.js b/test/built-ins/BigInt/negative-infinity-throws.rangeerror.js
new file mode 100644
index 0000000000..4c53cfce8c
--- /dev/null
+++ b/test/built-ins/BigInt/negative-infinity-throws.rangeerror.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2017 The V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt throws a RangeError if value is Infinity
+esid: sec-bigint-constructor
+info: |
+  BigInt ( value )
+
+  ...
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+  ...
+
+  NumberToBigInt ( number )
+
+  ...
+  2. If IsSafeInteger(number) is false, throw a RangeError exception.
+  ...
+
+  IsSafeInteger ( number )
+
+  ...
+  2. If number is NaN, +∞, or -∞, return false.
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  BigInt(-Infinity);
+});
+
+var calls = 0;
+var obj = {
+  valueOf: function() {
+    calls++;
+    return -Infinity;
+  }
+}
+assert.throws(RangeError, function() {
+  BigInt(obj);
+});
+assert.sameValue(calls, 1, "it fails after fetching the primitive value");
diff --git a/test/built-ins/BigInt/new-target-throws.js b/test/built-ins/BigInt/new-target-throws.js
new file mode 100644
index 0000000000..73674c8b29
--- /dev/null
+++ b/test/built-ins/BigInt/new-target-throws.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Throws a TypeError if BigInt is called with a new target
+esid: sec-bigint-constructor
+info: |
+  1. If NewTarget is not undefined, throw a TypeError exception.
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  ...
+features: [BigInt]
+---*/
+
+assert.throws(TypeError, function() {
+  new BigInt();
+});
+
+assert.throws(TypeError, function() {
+  new BigInt(NaN);
+});
+
+assert.throws(TypeError, function() {
+  new BigInt({
+    valueOf: function() { throw new Test262Error("unreachable"); }
+  });
+});
+
+for (let x of [NaN, Infinity, 0.5, 2**53]) {
+    assert.throws(RangeError, () => BigInt(x));
+    assert.throws(RangeError, () => BigInt(-x));
+}
+assert.sameValue(BigInt(9007199254740991), 9007199254740991n);
+assert.sameValue(BigInt(-9007199254740991), -9007199254740991n);
diff --git a/test/built-ins/BigInt/non-integer-rangeerror.js b/test/built-ins/BigInt/non-integer-rangeerror.js
new file mode 100644
index 0000000000..7f8f00ffcb
--- /dev/null
+++ b/test/built-ins/BigInt/non-integer-rangeerror.js
@@ -0,0 +1,57 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Non integer number values will throw a RangeError
+esid: sec-bigint-constructor
+info: |
+  BigInt ( value )
+
+  ...
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+  ...
+
+  NumberToBigInt ( number )
+
+  ...
+  2. If IsSafeInteger(number) is false, throw a RangeError exception.
+  ...
+
+  IsSafeInteger ( number )
+
+  ...
+  2. If number is NaN, +∞, or -∞, return false.
+  3. Let integer be ToInteger(number).
+  4. If integer is not equal to number, return false.
+  ...
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  BigInt(0.00005);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(-0.00005);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(.1);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(-.1);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(1.1);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(-1.1);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(Number.MIN_VALUE);
+});
diff --git a/test/built-ins/BigInt/out-of-bounds-integer-rangeerror.js b/test/built-ins/BigInt/out-of-bounds-integer-rangeerror.js
new file mode 100644
index 0000000000..cae05d72bd
--- /dev/null
+++ b/test/built-ins/BigInt/out-of-bounds-integer-rangeerror.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt throws a RangeError if value is not a safe integer.
+esid: sec-bigint-constructor
+info: |
+  BigInt ( value )
+
+  ...
+  2. Let prim be ? ToPrimitive(value, hint Number).
+  3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+  ...
+
+  NumberToBigInt ( number )
+
+  ...
+  2. If IsSafeInteger(number) is false, throw a RangeError exception.
+  ...
+
+  IsSafeInteger ( number )
+
+  ...
+  3. Let integer be ToInteger(number).
+  4. If integer is not equal to number, return false.
+  5. If abs(integer) ≤ 2**53-1, return true.
+  6. Otherwise, return false.
+features: [BigInt]
+---*/
+
+var pos = Math.pow(2, 53);
+var neg = -pos;
+
+assert.throws(RangeError, function() {
+  BigInt(pos);
+});
+
+assert.throws(RangeError, function() {
+  BigInt(neg);
+});
diff --git a/test/built-ins/BigInt/parseInt/parseInt.js b/test/built-ins/BigInt/parseInt/parseInt.js
new file mode 100644
index 0000000000..e41681d66c
--- /dev/null
+++ b/test/built-ins/BigInt/parseInt/parseInt.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt string parsing
+esid: pending
+features: [BigInt]
+---*/
+
+assert.throws(SyntaxError, () => BigInt.parseInt(""));
+assert.throws(SyntaxError, () => BigInt.parseInt("@"));
+assert.throws(SyntaxError, () => BigInt.parseInt("1", 1));
+assert.throws(SyntaxError, () => BigInt.parseInt("1", 37));
+assert.sameValue(BigInt.parseInt("0xf", 0), 0xfn);
+assert.sameValue(BigInt.parseInt("-0"), 0n);
+assert.sameValue(BigInt.parseInt(" 0@"), 0n);
+assert.sameValue(BigInt.parseInt("kf12oikf12oikf12oi", 36),
+                 5849853453554480289462428370n);
diff --git a/test/built-ins/BigInt/prop-desc.js b/test/built-ins/BigInt/prop-desc.js
new file mode 100644
index 0000000000..30a731255a
--- /dev/null
+++ b/test/built-ins/BigInt/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 The V8 Project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-bigint-constructor
+description: >
+  Property descriptor of BigInt
+info: |
+  The BigInt Object
+
+  ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(this, "BigInt", {
+  enumerable: false,
+  writable: true,
+  configurable: true
+});
diff --git a/test/built-ins/BigInt/proto.js b/test/built-ins/BigInt/proto.js
new file mode 100644
index 0000000000..331e347aa6
--- /dev/null
+++ b/test/built-ins/BigInt/proto.js
@@ -0,0 +1,15 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: The prototype of BigInt constructor is Function.prototype
+esid: sec-properties-of-the-bigint-constructor
+info: >
+  The value of the [[Prototype]] internal slot of the BigInt constructor is the
+  intrinsic object %FunctionPrototype%.
+features: [BigInt]
+---*/
+
+var proto = Object.getPrototypeOf(BigInt);
+
+assert.sameValue(proto, Function.prototype);
diff --git a/test/built-ins/BigInt/prototype/prop-desc.js b/test/built-ins/BigInt/prototype/prop-desc.js
new file mode 100644
index 0000000000..804a7b1a80
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/prop-desc.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: The property descriptor BigInt.prototype
+esid: sec-bigint.prototype
+info: >
+  This property has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+  [[Configurable]]: false }.
+features: [BigInt]
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(BigInt, "prototype", {
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
diff --git a/test/built-ins/BigInt/prototype/proto.js b/test/built-ins/BigInt/prototype/proto.js
new file mode 100644
index 0000000000..0183c817ae
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/proto.js
@@ -0,0 +1,14 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: The prototype of BigInt.prototype is Object.prototype
+esid: sec-properties-of-the-bigint-prototype-object
+info: >
+  The value of the [[Prototype]] internal slot of the BigInt prototype object
+  is the intrinsic object %ObjectPrototype%.
+features: [BigInt]
+---*/
+
+var proto = Object.getPrototypeOf(BigInt.prototype);
+assert.sameValue(proto, Object.prototype);
diff --git a/test/built-ins/JSON/stringify/bigint.js b/test/built-ins/JSON/stringify/bigint.js
new file mode 100644
index 0000000000..7aa38a3220
--- /dev/null
+++ b/test/built-ins/JSON/stringify/bigint.js
@@ -0,0 +1,10 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: JSON serialization of BigInt values
+esid: pending
+features: [BigInt]
+---*/
+
+assert.throws(TypeError, () => JSON.stringify(0n));
diff --git a/test/built-ins/Number/bigint-conversion.js b/test/built-ins/Number/bigint-conversion.js
new file mode 100644
index 0000000000..12fe032295
--- /dev/null
+++ b/test/built-ins/Number/bigint-conversion.js
@@ -0,0 +1,11 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt to Number conversion
+esid: pending
+features: [BigInt]
+---*/
+
+assert.sameValue(Number(0n), 0);
+assert.sameValue(+(new Number(0n)), +(new Number(0)));
diff --git a/test/built-ins/Object/bigint.js b/test/built-ins/Object/bigint.js
new file mode 100644
index 0000000000..810247da66
--- /dev/null
+++ b/test/built-ins/Object/bigint.js
@@ -0,0 +1,11 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Conversion of BigInt values to Objects
+esid: pending
+features: [BigInt]
+---*/
+
+assert(Object(0n) instanceof BigInt);
+assert.sameValue(Object(0n).valueOf(), 0n);
diff --git a/test/built-ins/Object/setPrototypeOf/bigint.js b/test/built-ins/Object/setPrototypeOf/bigint.js
new file mode 100644
index 0000000000..63545034f8
--- /dev/null
+++ b/test/built-ins/Object/setPrototypeOf/bigint.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: RequireObjectCoercible for BigInt values
+esid: pending
+features: [BigInt]
+---*/
+
+try {
+    let {} = 0n;
+} catch (e) {
+    $ERROR('Expected RequireObjectCoercible to succeed for BigInt values');
+}
+
+assert.sameValue(Object.setPrototypeOf(0n, null), 0n);
diff --git a/test/language/expressions/addition/coerce-bigint-to-string.js b/test/language/expressions/addition/coerce-bigint-to-string.js
new file mode 100644
index 0000000000..2a74718b78
--- /dev/null
+++ b/test/language/expressions/addition/coerce-bigint-to-string.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: ToString is applied BigInt values in an additive expression with another string
+esid: prod-AdditiveExpression
+info: |
+  AdditiveExpression: AdditiveExpression + MultiplicativeExpression
+
+  ...
+  7. If Type(lprim) is String or Type(rprim) is String, then
+    a. Let lstr be ? ToString(lprim).
+    b. Let rstr be ? ToString(rprim).
+    c. Return the String that is the result of concatenating lstr and rstr.
+  ...
+
+  ToString Applied to the BigInt Type
+
+  1. If i is less than zero, return the String concatenation of the String "-" and ToString(-i).
+  2. Return the String consisting of the code units of the digits of the decimal representation of i.
+features: [BigInt]
+---*/
+
+function ToString(x) { return x + ""; }
+
+assert.sameValue(-1n + "", "-1");
+assert.sameValue("" + -1n, "-1");
+assert.sameValue(0n + "", "0");
+assert.sameValue("" + 0n, "0");
+assert.sameValue(1n + "", "1");
+assert.sameValue("" + 1n, "1");
+assert.sameValue(123456789000000000000000n + "", "123456789000000000000000");
+assert.sameValue("" + 123456789000000000000000n, "123456789000000000000000");
+assert.sameValue(-123456789000000000000000n + "", "-123456789000000000000000");
+assert.sameValue("" + -123456789000000000000000n, "-123456789000000000000000");
diff --git a/test/language/expressions/division/bigint-complex-infinity.js b/test/language/expressions/division/bigint-complex-infinity.js
new file mode 100644
index 0000000000..636b28b65b
--- /dev/null
+++ b/test/language/expressions/division/bigint-complex-infinity.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt division of complex infinity (1/0)
+esid: sec-multiplicative-operators-runtime-semantics-evaluation
+info: |
+  Runtime Semantics: Evaluation
+
+  MultiplicativeExpression: MultiplicativeExpression MultiplicativeOperator ExponentiationExpression
+
+  ...
+  11. If MultiplicativeOperator is /, return T::divide(lnum, rnum).
+  ...
+
+  BigInt::divide (x, y)
+
+  1. If y is 0n, throw a RangeError exception.
+  ...
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  1n / 0n
+});
+
+assert.throws(RangeError, function() {
+  10n / 0n
+});
+
+assert.throws(RangeError, function() {
+  0n / 0n
+});
+
+assert.throws(RangeError, function() {
+  1000000000000000000n / 0n
+});
diff --git a/test/language/expressions/exponentiation/bigint-exp-operator-negative-throws.js b/test/language/expressions/exponentiation/bigint-exp-operator-negative-throws.js
new file mode 100644
index 0000000000..f46a9beac5
--- /dev/null
+++ b/test/language/expressions/exponentiation/bigint-exp-operator-negative-throws.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: If the BigInt exponent is < 0, throw a RangeError exception
+esid: sec-exp-operator-runtime-semantics-evaluation
+info: |
+  ExponentiationExpression: UpdateExpression ** ExponentiationExpression
+
+  ...
+  9. Return ? Type(base)::exponentiate(base, exponent).
+
+  BigInt::exponentiate (base, exponent)
+
+  1. If exponent < 0, throw a RangeError exception.
+  2. If base is 0n and exponent is 0n, return 1n.
+  3. Return a BigInt representing the mathematical value of base raised to the power exponent.
+  ...
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  1n ** -1n
+});
+
+assert.throws(RangeError, function() {
+  0n ** -1n
+});
+
+assert.throws(RangeError, function() {
+  (-1n) ** -1n
+});
+
+assert.throws(RangeError, function() {
+  1n ** -100000000000000000n
+});
diff --git a/test/language/expressions/exponentiation/bigint-zero-base-zero-exponent.js b/test/language/expressions/exponentiation/bigint-zero-base-zero-exponent.js
new file mode 100644
index 0000000000..a1080f465b
--- /dev/null
+++ b/test/language/expressions/exponentiation/bigint-zero-base-zero-exponent.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: If the BigInt base and exponent are both 0n, return 1n
+esid: sec-exp-operator-runtime-semantics-evaluation
+info: |
+  ExponentiationExpression: UpdateExpression ** ExponentiationExpression
+
+  ...
+  9. Return ? Type(base)::exponentiate(base, exponent).
+
+  BigInt::exponentiate (base, exponent)
+
+  1. If exponent < 0, throw a RangeError exception.
+  2. If base is 0n and exponent is 0n, return 1n.
+  3. Return a BigInt representing the mathematical value of base raised to the power exponent.
+  ...
+features: [BigInt]
+---*/
+
+assert.sameValue(0n ** 0n, 1n);
diff --git a/test/language/expressions/greater-than-or-equal/bigint-and-number.js b/test/language/expressions/greater-than-or-equal/bigint-and-number.js
new file mode 100644
index 0000000000..4216193074
--- /dev/null
+++ b/test/language/expressions/greater-than-or-equal/bigint-and-number.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Comparisons of BigInt and Number values
+esid: sec-abstract-relational-comparison
+info: |
+  ...
+  3. If both px and py are Strings, then
+    ...
+  4. Else,
+    a. Let nx be ? ToNumeric(px). Because px and py are primitive values evaluation order is not important.
+    b. Let ny be ? ToNumeric(py).
+    c. If Type(nx) is Type(ny), return ? Type(nx)::lessThan(nx, ny).
+    d. Assert: Type(nx) is BigInt and Type(ny) is Number, or if Type(nx) is Number and Type(ny) is BigInt.
+    e. If x or y are any of NaN, return undefined.
+    f. If x is -∞, or y is +∞, return true.
+    g. If x is +∞, or y is -∞, return false.
+    h. If the mathematical value of nx is less than the mathematical value of ny, return true, otherwise return false.
+features: [BigInt]
+---*/
+
+assert.sameValue(1n >= 0, true);
+assert.sameValue(1n >= 0.999999999999, true);
+assert.sameValue(1 >= 0n, true);
+assert.sameValue(0.000000000001 >= 0n, true);
+assert.sameValue(1n >= 1, true);
+assert.sameValue(1 >= 1n, true);
+assert.sameValue(0n >= 1, false);
+assert.sameValue(0 >= 1n, false);
+assert.sameValue(0 >= 0n, true);
+assert.sameValue(0n >= 0, true);
+assert.sameValue(1n >= Number.MAX_VALUE, false);
+assert.sameValue(Number.MIN_VALUE >= 0n, false);
+assert.sameValue(-10n >= Number.MIN_VALUE, true);
+assert.sameValue(Number.MAX_VALUE >= 10000000000n, true);
diff --git a/test/language/expressions/greater-than/bigint-and-number.js b/test/language/expressions/greater-than/bigint-and-number.js
new file mode 100644
index 0000000000..9210cf7874
--- /dev/null
+++ b/test/language/expressions/greater-than/bigint-and-number.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Comparisons of BigInt and Number values
+esid: sec-abstract-relational-comparison
+info: |
+  ...
+  3. If both px and py are Strings, then
+    ...
+  4. Else,
+    a. Let nx be ? ToNumeric(px). Because px and py are primitive values evaluation order is not important.
+    b. Let ny be ? ToNumeric(py).
+    c. If Type(nx) is Type(ny), return ? Type(nx)::lessThan(nx, ny).
+    d. Assert: Type(nx) is BigInt and Type(ny) is Number, or if Type(nx) is Number and Type(ny) is BigInt.
+    e. If x or y are any of NaN, return undefined.
+    f. If x is -∞, or y is +∞, return true.
+    g. If x is +∞, or y is -∞, return false.
+    h. If the mathematical value of nx is less than the mathematical value of ny, return true, otherwise return false.
+features: [BigInt]
+---*/
+
+assert.sameValue(1n > 0, true);
+assert.sameValue(1n > 0.999999999999, true);
+assert.sameValue(1 > 0n, true);
+assert.sameValue(0.000000000001 > 0n, true);
+assert.sameValue(1n > 1, false);
+assert.sameValue(1 > 1n, false);
+assert.sameValue(0n > 1, false);
+assert.sameValue(0 > 1n, false);
+assert.sameValue(0 > 0n, false);
+assert.sameValue(0n > 0, false);
+assert.sameValue(1n > Number.MAX_VALUE, false);
+assert.sameValue(Number.MIN_VALUE > 0n, false);
+assert.sameValue(-10n > Number.MIN_VALUE, true);
+assert.sameValue(Number.MAX_VALUE > 10000000000n, true);
diff --git a/test/language/expressions/less-than-or-equal/bigint-and-number.js b/test/language/expressions/less-than-or-equal/bigint-and-number.js
new file mode 100644
index 0000000000..f4b6619fa6
--- /dev/null
+++ b/test/language/expressions/less-than-or-equal/bigint-and-number.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Comparisons of BigInt and Number values
+esid: sec-abstract-relational-comparison
+info: |
+  ...
+  3. If both px and py are Strings, then
+    ...
+  4. Else,
+    a. Let nx be ? ToNumeric(px). Because px and py are primitive values evaluation order is not important.
+    b. Let ny be ? ToNumeric(py).
+    c. If Type(nx) is Type(ny), return ? Type(nx)::lessThan(nx, ny).
+    d. Assert: Type(nx) is BigInt and Type(ny) is Number, or if Type(nx) is Number and Type(ny) is BigInt.
+    e. If x or y are any of NaN, return undefined.
+    f. If x is -∞, or y is +∞, return true.
+    g. If x is +∞, or y is -∞, return false.
+    h. If the mathematical value of nx is less than the mathematical value of ny, return true, otherwise return false.
+features: [BigInt]
+---*/
+
+assert.sameValue(1n <= 0, false);
+assert.sameValue(1n <= 0.999999999999, false);
+assert.sameValue(1 <= 0n, false);
+assert.sameValue(0.000000000001 <= 0n, false);
+assert.sameValue(1n <= 1, true);
+assert.sameValue(1 <= 1n, true);
+assert.sameValue(0n <= 1, true);
+assert.sameValue(0 <= 1n, true);
+assert.sameValue(0 <= 0n, true);
+assert.sameValue(0n <= 0, true);
+assert.sameValue(1n <= Number.MAX_VALUE, true);
+assert.sameValue(Number.MIN_VALUE <= 0n, true);
+assert.sameValue(-10n <= Number.MIN_VALUE, false);
+assert.sameValue(Number.MAX_VALUE <= 10000000000n, false);
diff --git a/test/language/expressions/less-than/bigint-and-number.js b/test/language/expressions/less-than/bigint-and-number.js
new file mode 100644
index 0000000000..29de5f5d30
--- /dev/null
+++ b/test/language/expressions/less-than/bigint-and-number.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Comparisons of BigInt and Number values
+esid: sec-abstract-relational-comparison
+info: |
+  ...
+  3. If both px and py are Strings, then
+    ...
+  4. Else,
+    a. Let nx be ? ToNumeric(px). Because px and py are primitive values evaluation order is not important.
+    b. Let ny be ? ToNumeric(py).
+    c. If Type(nx) is Type(ny), return ? Type(nx)::lessThan(nx, ny).
+    d. Assert: Type(nx) is BigInt and Type(ny) is Number, or if Type(nx) is Number and Type(ny) is BigInt.
+    e. If x or y are any of NaN, return undefined.
+    f. If x is -∞, or y is +∞, return true.
+    g. If x is +∞, or y is -∞, return false.
+    h. If the mathematical value of nx is less than the mathematical value of ny, return true, otherwise return false.
+features: [BigInt]
+---*/
+
+assert.sameValue(1n < 0, false);
+assert.sameValue(1n < 0.999999999999, false);
+assert.sameValue(1 < 0n, false);
+assert.sameValue(0.000000000001 < 0n, false);
+assert.sameValue(1n < 1, true);
+assert.sameValue(1 < 1n, true);
+assert.sameValue(0n < 1, true);
+assert.sameValue(0 < 1n, true);
+assert.sameValue(0 < 0n, true);
+assert.sameValue(0n < 0, true);
+assert.sameValue(1n < Number.MAX_VALUE, true);
+assert.sameValue(Number.MIN_VALUE < 0n, true);
+assert.sameValue(-10n < Number.MIN_VALUE, false);
+assert.sameValue(Number.MAX_VALUE < 10000000000n, false);
diff --git a/test/language/expressions/logical-not/bigint.js b/test/language/expressions/logical-not/bigint.js
new file mode 100644
index 0000000000..294ebe93d0
--- /dev/null
+++ b/test/language/expressions/logical-not/bigint.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Conversion of BigInt values to booleans
+esid: sec-logical-not-operator-runtime-semantics-evaluation
+info: |
+  UnaryExpression: ! UnaryExpression
+
+  1. Let expr be the result of evaluating UnaryExpression.
+  2. Let oldValue be ToBoolean(? GetValue(expr)).
+  3. If oldValue is true, return false.
+  4. Return true.
+
+  ToBoolean ( argument )
+
+  BigInt: Return false if argument is 0n; otherwise return true.
+features: [BigInt]
+---*/
+
+assert.sameValue(!0n, true, "!0n");
+assert.sameValue(!1n, false, "!1n");
+assert.sameValue(!-1n, false, "!-1n");
diff --git a/test/language/expressions/modulus/bigint-modulo-zero.js b/test/language/expressions/modulus/bigint-modulo-zero.js
new file mode 100644
index 0000000000..b309a7e676
--- /dev/null
+++ b/test/language/expressions/modulus/bigint-modulo-zero.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt modulo 0 throws a range error
+esid: sec-multiplicative-operators-runtime-semantics-evaluation
+info: |
+  Runtime Semantics: Evaluation
+
+  MultiplicativeExpression: MultiplicativeExpression MultiplicativeOperator ExponentiationExpression
+
+  ...
+  12. Otherwise, MultiplicativeOperator is %; return T::remainder(lnum, rnum).
+  ...
+
+  BigInt::remainder (x, y)
+
+  1. If y is 0n, throw a RangeError exception.
+  2. Return the BigInt representing x modulo y.
+features: [BigInt]
+---*/
+
+assert.throws(RangeError, function() {
+  1n % 0n
+});
+
+assert.throws(RangeError, function() {
+  10n % 0n
+});
+
+assert.throws(RangeError, function() {
+  0n % 0n
+});
+
+assert.throws(RangeError, function() {
+  1000000000000000000n % 0n
+});
diff --git a/test/language/expressions/unary-plus/bigint-throws.js b/test/language/expressions/unary-plus/bigint-throws.js
new file mode 100644
index 0000000000..f3960c740e
--- /dev/null
+++ b/test/language/expressions/unary-plus/bigint-throws.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: The Unary + Operator throws a TypeError on BigInt numbers
+esid: sec-unary-plus-operator-runtime-semantics-evaluation
+info: |
+  UnaryExpression: + UnaryExpression
+
+  1. Let expr be the result of evaluating UnaryExpression.
+  2. Return ? ToNumber(? GetValue(expr)).
+
+  ToNumber ( argument )
+
+  BigInt: Throw a TypeError exception
+features: [BigInt]
+---*/
+
+assert.throws(TypeError, function() { +0n });
+assert.throws(TypeError, function() { +1n });
+assert.throws(TypeError, function() { +-1n });
+assert.throws(TypeError, function() { +1000000000000000n });
diff --git a/test/language/literals/bigint/binary-invalid-digit.js b/test/language/literals/bigint/binary-invalid-digit.js
new file mode 100644
index 0000000000..25039b5d25
--- /dev/null
+++ b/test/language/literals/bigint/binary-invalid-digit.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Binary BigInt literal containing an invalid digit
+esid: prod-NumericLiteral
+info: |
+  NumericLiteral ::
+    NumericLiteralBase NumericLiteralSuffix
+
+  NumericLiteralBase ::
+    DecimalLiteral
+    BinaryIntegerLiteral
+    OctalIntegerLiteral
+    HexIntegerLiteral
+
+  NumericLiteralSuffix :: n
+negative:
+  phase: early
+  type: SyntaxError
+features: [BigInt]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+0b2n;
diff --git a/test/language/literals/bigint/exponent-part.js b/test/language/literals/bigint/exponent-part.js
new file mode 100644
index 0000000000..bbf821fd01
--- /dev/null
+++ b/test/language/literals/bigint/exponent-part.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: > 
+  It is a Syntax Error if the NumericLiteralBase contains an ExponentPart.
+esid: sec-numeric-literal-static-semantics-early-errors
+features: [BigInt]
+negative:
+  phase: early
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+0e0n;
diff --git a/test/language/literals/bigint/hexadecimal-invalid-digit.js b/test/language/literals/bigint/hexadecimal-invalid-digit.js
new file mode 100644
index 0000000000..44b2856df0
--- /dev/null
+++ b/test/language/literals/bigint/hexadecimal-invalid-digit.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Hexadecimal BigInt literal containing an invalid digit
+esid: prod-NumericLiteral
+info: |
+  NumericLiteral ::
+    NumericLiteralBase NumericLiteralSuffix
+
+  NumericLiteralBase ::
+    DecimalLiteral
+    BinaryIntegerLiteral
+    OctalIntegerLiteral
+    HexIntegerLiteral
+
+  NumericLiteralSuffix :: n
+negative:
+  phase: early
+  type: SyntaxError
+features: [BigInt]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+0xgn;
diff --git a/test/language/literals/bigint/octal-invalid-digit.js b/test/language/literals/bigint/octal-invalid-digit.js
new file mode 100644
index 0000000000..02914ad339
--- /dev/null
+++ b/test/language/literals/bigint/octal-invalid-digit.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Robin Templeton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Octal BigInt literal containing an invalid digit
+esid: prod-NumericLiteral
+info: |
+  NumericLiteral ::
+    NumericLiteralBase NumericLiteralSuffix
+
+  NumericLiteralBase ::
+    DecimalLiteral
+    BinaryIntegerLiteral
+    OctalIntegerLiteral
+    HexIntegerLiteral
+
+  NumericLiteralSuffix :: n
+negative:
+  phase: early
+  type: SyntaxError
+features: [BigInt]
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+0o9n;