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diff --git a/external/contributions/Microsoft/ietestcenter_build_2011/TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-11.js b/external/contributions/Microsoft/ietestcenter_build_2011/TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-11.js
new file mode 100644
index 000000000..3ffba3ba7
--- /dev/null
+++ b/external/contributions/Microsoft/ietestcenter_build_2011/TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-11.js
@@ -0,0 +1,67 @@
+/// 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 7b of [[DefineOwnProperty]] rejects if
+current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
+of each other.
+*/
+
+ES5Harness.registerTest( {
+id: "15.2.3.6-4-11",
+
+path: "TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-11.js",
+
+description: "Object.defineProperty throws TypeError when changing [[Enumerable]] from true to false on non-configurable accessor properties",
+
+test: function testcase() {
+  var o = {};
+
+  // create an accessor property; all other attributes default to false.
+  // dummy getter
+  var getter = function () { return 1; }
+  var d1 = { get: getter, enumerable: true, configurable: false };
+  Object.defineProperty(o, "foo", d1);
+
+  // now, setting enumerable to true should fail, since [[Configurable]]
+  // on the original property will be false.
+  var desc = { get: getter, enumerable: false };
+
+  try {
+    Object.defineProperty(o, "foo", desc);
+  }
+  catch (e) {
+    if (e instanceof TypeError) {
+      // the property should remain unchanged.
+      var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+      if (d2.get === getter &&
+          d2.enumerable === true &&
+          d2.configurable === false) {
+        return true;
+      }
+    }
+  }
+ },
+
+precondition: function prereq() {
+  return fnExists(Object.defineProperty) && fnExists(Object.getOwnPropertyDescriptor);
+ }
+});