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diff --git a/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-8-s.js b/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-8-s.js
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index 000000000..c73f8d833
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+++ b/js/src/tests/test262/ch11/11.4/11.4.1/11.4.1-4.a-8-s.js
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+/// Copyright (c) 2012 Ecma International.  All rights reserved. 
+/// Ecma International makes this code available under the terms and conditions set
+/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
+/// "Use Terms").   Any redistribution of this code must retain the above 
+/// copyright and this notice and otherwise comply with the Use Terms.
+/**
+ * This test is actually testing the [[Delete]] internal method (8.12.8). Since the
+ * language provides no way to directly exercise [[Delete]], the tests are placed here.
+ *
+ * @path ch11/11.4/11.4.1/11.4.1-4.a-8-s.js
+ * @description delete operator throws TypeError when deleting a non-configurable data property in strict mode
+ * @onlyStrict
+ */
+
+
+function testcase() {
+  'use strict';
+  
+  // NaN (15.1.1.1) has [[Configurable]] set to false.
+  try {
+    delete fnGlobalObject().NaN;
+    return false;
+  }
+  catch (e) {
+    return (e instanceof TypeError);
+  }
+ }
+runTestCase(testcase);