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diff --git a/test/suite/ietestcenter/chapter15/15.12/15.12.3/15.12.3-6-a-2.js b/test/suite/ietestcenter/chapter15/15.12/15.12.3/15.12.3-6-a-2.js
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+++ b/test/suite/ietestcenter/chapter15/15.12/15.12.3/15.12.3-6-a-2.js
@@ -0,0 +1,37 @@
+/// 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: "15.12.3-6-a-2",
+
+path: "TestCases/chapter15/15.12/15.12.3/15.12.3-6-a-2.js",
+
+description: "JSON.stringify truccates non-integer numeric space arguments to their integer part.",
+
+test: function testcase() {
+  var obj = {a1: {b1: [1,2,3,4], b2: {c1: 1, c2: 2}},a2: 'a2'};
+  return JSON.stringify(obj,null, 5.99999)=== JSON.stringify(obj,null, 5);
+  },
+  
+ precondition: function preq () {
+  return JSON && fnExists(JSON.stringify);
+ }
+} );