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diff --git a/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-1.js b/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-1.js
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+++ b/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-1.js
@@ -0,0 +1,43 @@
+/// Copyright (c) 2009 Microsoft Corporation 
+/// 
+/// Redistribution and use in source and binary forms, with or without modification, are permitted provided
+/// that the following conditions are met: 
+///    * Redistributions of source code must retain the above copyright notice, this list of conditions and
+///      the following disclaimer. 
+///    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 
+///      the following disclaimer in the documentation and/or other materials provided with the distribution.  
+///    * Neither the name of Microsoft nor the names of its contributors may be used to
+///      endorse or promote products derived from this software without specific prior written permission.
+/// 
+/// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+/// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+/// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+/// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+/// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+/// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+/// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+ES5Harness.registerTest({
+    id: "15.4.4.22-9-1",
+
+    path: "TestCases/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-9-1.js",
+
+    description: "Array.prototype.reduceRight doesn't consider new elements which index is larger than array original length added to array after it is called, consider new elements which index is smaller than array length",
+
+    test: function testcase() {
+        function callbackfn(prevVal, curVal, idx, obj) {
+            arr[5] = 6;
+            arr[2] = 3;
+            return prevVal + curVal;
+        }
+
+        var arr = ['1', 2, , 4, '5'];
+        return arr.reduceRight(callbackfn) === "54321";
+    },
+
+    precondition: function prereq() {
+        return fnExists(Array.prototype.reduceRight);
+    }
+});