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diff --git a/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-622.js b/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-622.js
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+++ b/test/suite/ietestcenter/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-622.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.
+
+ES5Harness.registerTest({
+    id: "15.2.3.6-4-622",
+
+    path: "TestCases/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-622.js",
+
+    description: "ES5 Attributes - all attributes in Date.now are correct",
+
+    test: function testcase() {
+        var desc = Object.getOwnPropertyDescriptor(Date, "now");
+
+        var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+        var temp = Date.now;
+
+        try {
+            Date.now = "2010";
+
+            var isWritable = (Date.now === "2010");
+
+            var isEnumerable = false;
+
+            for (var prop in Date) {
+                if (prop === "now") {
+                    isEnumerable = true;
+                }
+            }
+
+            delete Date.now;
+
+            var isConfigurable = !Date.hasOwnProperty("now");
+
+            return propertyAreCorrect && isWritable && !isEnumerable && isConfigurable;
+        } finally {
+            Object.defineProperty(Date, "now", {
+                value: temp,
+                writable: true,
+                enumerable: false,
+                configurable: true
+            });
+        }
+    },
+
+    precondition: function prereq() {
+        return fnExists(Object.defineProperty) && fnExists(Object.getOwnPropertyDescriptor) && fnExists(Date.now);
+    }
+});
+