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diff --git a/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-7-6.js b/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-7-6.js
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+++ b/test/suite/ietestcenter/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-7-6.js
@@ -0,0 +1,48 @@
+/// 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: "15.4.4.22-7-6",
+
+path: "TestCases/chapter15/15.4/15.4.4/15.4.4.22/15.4.4.22-7-6.js",
+
+description: "Array.prototype.reduceRight returns initialValue if 'length' is 0 and initialValue is present (subclassed Array, length overridden with obj with valueOf)",
+
+test: function testcase() {
+  foo.prototype = new Array(1, 2, 3);
+  function foo() {}
+  var f = new foo();
+  
+  var o = { valueOf: function () { return 0;}};
+  f.length = o;
+  
+  function cb(){}
+  try {
+    if(f.reduceRight(cb,1) === 1)
+      return true;
+  }
+  catch (e) {  }  
+ },
+
+precondition: function prereq() {
+  return fnExists(Array.prototype.reduceRight);
+ }
+});