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diff --git a/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js b/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js
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+++ b/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js
@@ -0,0 +1,72 @@
+/// 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. 
+
+/*
+Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+of O to define the property. Step 6 of [[DefineOwnProperty]] returns if
+every field of desc also occurs in current and every field in desc has
+the same value as current.
+*/
+
+ES5Harness.registerTest( {
+id: "15.2.3.6-4-6",
+
+path: "TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js",
+
+description: "Object.defineProperty is no-op if current and desc are the same accessor desc",
+
+test: function testcase() {
+  function sameAccessorDescriptorValues(d1, d2) {
+    return (d1.get == d2.get &&
+            d1.enumerable == d2.enumerable &&
+            d1.configurable == d2.configurable);
+  }
+
+  var o = {};
+
+  // create an accessor property with the following attributes:
+  // enumerable: true, configurable: true
+  var desc = {
+               get: function () {},
+               enumerable: true,
+               configurable: true
+             };
+
+  Object.defineProperty(o, "foo", desc);
+
+  // query for, and save, the desc. A subsequent call to defineProperty
+  // with the same desc should not disturb the property definition.
+  var d1 = Object.getOwnPropertyDescriptor(o, "foo");  
+
+  // now, redefine the property with the same descriptor
+  // the property defintion should not get disturbed.
+  Object.defineProperty(o, "foo", desc);
+
+  var d2 = Object.getOwnPropertyDescriptor(o, "foo"); 
+
+  if (sameAccessorDescriptorValues(d1, d2) === true) {
+    return true;
+  }
+ },
+
+precondition: function prereq() {
+  return fnExists(Object.defineProperty) && fnExists(Object.getOwnPropertyDescriptor);
+ }
+});