diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma/Number/15.7.3.4-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma/Number/15.7.3.4-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+   File Name:          15.7.3.4-3.js
+   ECMA Section:       15.7.3.4 Number.NaN
+   Description:        All value properties of the Number object should have
+   the attributes [DontEnum, DontDelete, ReadOnly]
+
+   this test checks the ReadOnly attribute of Number.NaN
+
+   Author:             christine@netscape.com
+   Date:               16 september 1997
+*/
+
+var SECTION = "15.7.3.4-3";
+var VERSION = "ECMA_1";
+startTest();
+var TITLE   = "Number.NaN";
+
+writeHeaderToLog( SECTION + " "+ TITLE );
+
+new TestCase( SECTION,
+	      "Number.NaN=0; Number.NaN",
+	      Number.NaN,
+	      eval("Number.NaN=0; Number.NaN") );
+
+test();