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diff --git a/js/src/tests/ecma_2/Exceptions/lexical-023.js b/js/src/tests/ecma_2/Exceptions/lexical-023.js
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@@ -0,0 +1,52 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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:          lexical-023.js
+   Corresponds To:     7.4.3-16-n.js
+   ECMA Section:       7.4.3
+   Description:
+   The following words are used as keywords in proposed extensions and are
+   therefore reserved to allow for the possibility of future adoption of
+   those extensions.
+
+   FutureReservedWord :: one of
+   case    debugger    export      super
+   catch   default     extends     switch
+   class   do          finally     throw
+   const   enum        import      try
+
+   Author:             christine@netscape.com
+   Date:               12 november 1997
+*/
+var SECTION = "lexical-023.js";
+var VERSION = "ECMA_1";
+var TITLE   = "Future Reserved Words";
+
+startTest();
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+var result = "Failed";
+var exception = "No exception thrown";
+var expect = "Passed";
+
+try {
+  eval("try = true;");
+} catch ( e ) {
+  result = expect;
+  exception = e.toString();
+}
+
+new TestCase(
+  SECTION,
+  "try = true" +
+  " (threw " + exception +")",
+  expect,
+  result );
+
+test();
+
+