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diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/tonumber-value-detached-buffer.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/tonumber-value-detached-buffer.js
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+++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/internals/Set/tonumber-value-detached-buffer.js
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+// Copyright (C) 2017 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-integer-indexed-exotic-objects-set-p-v-receiver
+description: >
+  Setting a typed array element to a value that, when converted to the typed
+  array element type, detaches the typed array's underlying buffer, will return true.
+info: |
+  9.4.5.5 [[Set]] ( P, V, Receiver)
+
+  ...
+  2. If Type(P) is String, then
+    a. Let numericIndex be ! CanonicalNumericIndexString(P).
+    b. If numericIndex is not undefined, then
+      i. Perform ? IntegerIndexedElementSet(O, numericIndex, V).
+      ii. Return true.
+  ...
+
+  9.4.5.11 IntegerIndexedElementSet ( O, index, value )
+
+  Assert: O is an Integer-Indexed exotic object.
+  If O.[[ContentType]] is BigInt, let numValue be ? ToBigInt(value).
+  Otherwise, let numValue be ? ToNumber(value).
+  Let buffer be O.[[ViewedArrayBuffer]].
+  If IsDetachedBuffer(buffer) is false and ! IsValidIntegerIndex(O, index) is true, then
+    Let offset be O.[[ByteOffset]].
+    Let arrayTypeName be the String value of O.[[TypedArrayName]].
+    Let elementSize be the Element Size value specified in Table 62 for arrayTypeName.
+    Let indexedPosition be (ℝ(index) × elementSize) + offset.
+    Let elementType be the Element Type value in Table 62 for arrayTypeName.
+    Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue, true, Unordered).
+  Return NormalCompletion(undefined).
+
+includes: [testTypedArray.js, detachArrayBuffer.js]
+features: [align-detached-buffer-semantics-with-web-reality, Reflect, TypedArray]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  let ta = new TA(1);
+  let result = Reflect.set(ta, 0, {
+    valueOf() {
+      $DETACHBUFFER(ta.buffer);
+      return 42;
+    }
+  });
+
+  assert.sameValue(result, true);
+  assert.sameValue(ta[0], undefined);
+});
+
+reportCompare(0, 0);