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diff --git a/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.js b/test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.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.
+
+/*---
+es5id: 15.4.4.15-8-b-i-20
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is an own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array
+includes: [runTestCase.js]
+---*/
+
+function testcase() {
+
+        var arr = [, 1];
+        try {
+            Object.defineProperty(Array.prototype, "0", {
+                get: function () {
+                    return 100;
+                },
+                configurable: true
+            });
+            Object.defineProperty(arr, "0", {
+                set: function () { },
+                configurable: true
+            });
+
+            return arr.hasOwnProperty(0) && arr.lastIndexOf(undefined) === 0;
+        } finally {
+            delete Array.prototype[0];
+        }
+    }
+runTestCase(testcase);