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diff --git a/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/nan-equivalence-define-own-property-reassign.js b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/nan-equivalence-define-own-property-reassign.js
new file mode 100644
index 0000000000..367b86a20d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/nan-equivalence-define-own-property-reassign.js
@@ -0,0 +1,70 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ordinary-object-internal-methods-and-internal-slots-defineownproperty-p-desc
+description: >
+  Replaces value field even if they pass in the SameValue algorithm, including
+  distinct NaN values
+info: |
+  This test does not compare the actual byte values, instead it simply checks that
+  the value is some valid NaN encoding.
+
+  ---
+
+  Previously, this test compared the "value" field using the SameValue
+  algorithm (thereby ignoring distinct NaN values)
+
+  ---
+
+  [[DefineOwnProperty]] (P, Desc)
+
+  Return ? OrdinaryDefineOwnProperty(O, P, Desc).
+
+  #sec-ordinarydefineownproperty
+  OrdinaryDefineOwnProperty ( O, P, Desc )
+
+  1. Let current be ? O.[[GetOwnProperty]](P).
+  2. Let extensible be O.[[Extensible]].
+  3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc,
+     current).
+
+  #sec-validateandapplypropertydescriptor
+  ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
+
+  ...
+  7. Else if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true,
+     then
+    a. If current.[[Configurable]] is false and current.[[Writable]] is false,
+       then
+      ...
+  ...
+  9. If O is not undefined, then
+    a. For each field of Desc that is present, set the corresponding attribute
+       of the property named P of object O to the value of the field.
+  10. Return true.
+
+  #sec-isnan-number
+
+  NOTE: A reliable way for ECMAScript code to test if a value X is a NaN is
+  an expression of the form  X !== X. The result will be true if and only
+  if X is a NaN.
+includes: [nans.js]
+---*/
+
+var len = NaNs.length;
+
+for (var idx = 0; idx < len; ++idx) {
+  for (var jdx = 0; jdx < len; ++jdx) {
+    var a = {};
+
+    a.prop = NaNs[idx];
+    a.prop = NaNs[jdx];
+
+    assert(
+      a.prop !== a.prop,
+      `Object property value reassigned to NaN produced by (index=${idx}) results in a valid NaN`
+    );
+  }
+}
+
+reportCompare(0, 0);