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diff --git a/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.js b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.js
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+++ b/test/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.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: 15.4.4.22-1-8
+description: Array.prototype.reduceRight applied to String object
+includes: [runTestCase.js]
+---*/
+
+function testcase() {
+
+        var obj = new String("hello\nworld\\!");
+        var accessed = false;
+
+        function callbackfn(prevVal, curVal, idx, o) {
+            accessed = true;
+            return o instanceof String;
+        }
+
+        return Array.prototype.reduceRight.call(obj, callbackfn, "h") && accessed;
+    }
+runTestCase(testcase);