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diff --git a/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-7.js b/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-7.js
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index 0000000000..35f92e2a9e
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+++ b/js/src/tests/test262/built-ins/Object/preventExtensions/15.2.3.10-3-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.10-3-7
+description: >
+ Object.preventExtensions - indexed properties cannot be added into
+ a Number object
+includes: [propertyHelper.js]
+---*/
+
+var obj = new Number(123);
+
+assert(Object.isExtensible(obj));
+Object.preventExtensions(obj);
+assert(!Object.isExtensible(obj));
+
+verifyNotWritable(obj, "0", "nocheck");
+
+assert(!obj.hasOwnProperty("0"));
+
+reportCompare(0, 0);