diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma/String/15.5.3.1-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma/String/15.5.3.1-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* -*- 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:          15.5.3.1-1.js
+   ECMA Section:       15.5.3.1 Properties of the String Constructor
+
+   Description:        The initial value of String.prototype is the built-in
+   String prototype object.
+
+   This property shall have the attributes [ DontEnum,
+   DontDelete, ReadOnly]
+
+   This tests the DontEnum attribute.
+
+   Author:             christine@netscape.com
+   Date:               1 october 1997
+*/
+
+var SECTION = "15.5.3.1-1";
+var VERSION = "ECMA_1";
+startTest();
+var TITLE   = "Properties of the String Constructor";
+
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+new TestCase( SECTION, "String.prototype.length",   0,  String.prototype.length );
+
+new TestCase(   SECTION,
+		"var str='';for ( p in String ) { if ( p == 'prototype' ) str += p; } str",
+		"",
+		eval("var str='';for ( p in String ) { if ( p == 'prototype' ) str += p; } str") );
+
+test();