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diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/bigint-tobiguint64.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/bigint-tobiguint64.js
new file mode 100644
index 0000000000..d1b8b9067e
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+++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/BigInt/bigint-tobiguint64.js
@@ -0,0 +1,104 @@
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-assignment-operators-runtime-semantics-evaluation
+description: >
+  Behavior for input array of BigInts
+info: |
+  Runtime Semantics: Evaluation
+  AssignmentExpression : LeftHandSideExpression = AssignmentExpression
+  1. If LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral, then
+  ...
+    f. Perform ? PutValue(lref, rval).
+  ...
+
+  PutValue ( V, W )
+  ...
+  6. Else if IsPropertyReference(V) is true, then
+    a. If HasPrimitiveBase(V) is true, then
+        i. Assert: In this case, base will never be undefined or null.
+        ii. Set base to ! ToObject(base).
+    b. Let succeeded be ? base.[[Set]](GetReferencedName(V), W, GetThisValue(V)).
+    c. If succeeded is false and IsStrictReference(V) is true, throw a TypeError
+       exception.
+    d. Return.
+
+  [[Set]] ( P, V, Receiver )
+  When the [[Set]] internal method of an Integer-Indexed exotic object O is
+  called with property key P, value V, and ECMAScript language value Receiver,
+  the following steps are taken:
+  1. Assert: IsPropertyKey(P) is true.
+  2. If Type(P) is String, then
+    a. Let numericIndex be ! CanonicalNumericIndexString(P).
+    b. If numericIndex is not undefined, then
+       i. Return ? IntegerIndexedElementSet(O, numericIndex, V).
+
+  IntegerIndexedElementSet ( O, index, value )
+  5. If arrayTypeName is "BigUint64Array" or "BigInt64Array",
+     let numValue be ? ToBigInt(value).
+  ...
+  16. Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue, true, "Unordered").
+  17. Return true.
+
+  SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isTypedArray, order [ , isLittleEndian ] )
+  ...
+  8. Let rawBytes be NumberToRawBytes(type, value, isLittleEndian).
+  ...
+
+  NumberToRawBytes( type, value, isLittleEndian )
+  ...
+  3. Else,
+    a. Let n be the Number value of the Element Size specified in Table
+       [The TypedArray Constructors] for Element Type type.
+    b. Let convOp be the abstract operation named in the Conversion Operation
+       column in Table 9 for Element Type type.
+
+  The TypedArray Constructors
+  Element Type: BigUint64
+  Conversion Operation: ToBigUint64
+
+  ToBigUint64 ( argument )
+  The abstract operation ToBigInt64 converts argument to one of 264 integer
+  values in the range -2^63 through 2^63-1, inclusive.
+  This abstract operation functions as follows:
+    1. Let n be ? ToBigInt(argument).
+    2. Let int64bit be n modulo 2^64.
+    3. Return int64bit.
+
+features: [align-detached-buffer-semantics-with-web-reality, BigInt, TypedArray]
+---*/
+// 2n ** 64n + 2n
+// 2n ** 63n + 2n
+// -(2n ** 63n) - 2n
+// -(2n ** 64n) - 2n
+// 2n ** 63n + 2n
+// 2n ** 64n - 2n
+// 2n ** 63n - 2n
+// 2n ** 64n - 2n
+var vals = [
+  18446744073709551618n,
+  9223372036854775810n,
+  2n,
+  0n,
+  -2n,
+  -9223372036854775810n,
+  -18446744073709551618n
+];
+
+var typedArray = new BigUint64Array(1);
+typedArray[0] = vals[0];
+assert.sameValue(typedArray[0], 2n, 'The value of typedArray[0] is 2n');
+typedArray[0] = vals[1];
+assert.sameValue(typedArray[0], 9223372036854775810n, 'The value of typedArray[0] is 9223372036854775810n');
+typedArray[0] = vals[2];
+assert.sameValue(typedArray[0], 2n, 'The value of typedArray[0] is 2n');
+typedArray[0] = vals[3];
+assert.sameValue(typedArray[0], 0n, 'The value of typedArray[0] is 0n');
+typedArray[0] = vals[4];
+assert.sameValue(typedArray[0], 18446744073709551614n, 'The value of typedArray[0] is 18446744073709551614n');
+typedArray[0] = vals[5];
+assert.sameValue(typedArray[0], 9223372036854775806n, 'The value of typedArray[0] is 9223372036854775806n');
+typedArray[0] = vals[6];
+assert.sameValue(typedArray[0], 18446744073709551614n, 'The value of typedArray[0] is 18446744073709551614n');
+
+reportCompare(0, 0);