diff --git a/js/tests/js1_6/Regress/regress-309242.js b/js/tests/js1_6/Regress/regress-309242.js
new file mode 100755
index 00000000000..e69de29bb2d
diff --git a/js/tests/js1_6/Regress/regress-311157-01.js b/js/tests/js1_6/Regress/regress-311157-01.js
new file mode 100755
index 00000000000..46af70c8c47
--- /dev/null
+++ b/js/tests/js1_6/Regress/regress-311157-01.js
@@ -0,0 +1,55 @@
+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2005
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Brendan Eich
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var bug = 311157;
+var summary = 'Comment-hiding compromise left E4X parsing/scanning inconsistent';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+printBugNumber (bug);
+printStatus (summary);
+
+try
+{
+    eval('var x = <hi> <!-- duh -->\n     there </hi>');
+}
+catch(e)
+{
+}
+
+reportCompare(expect, actual, summary);
+
diff --git a/js/tests/js1_6/Regress/regress-311157-02.js b/js/tests/js1_6/Regress/regress-311157-02.js
new file mode 100755
index 00000000000..a7ef464abe5
--- /dev/null
+++ b/js/tests/js1_6/Regress/regress-311157-02.js
@@ -0,0 +1,55 @@
+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2005
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Brendan Eich
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var bug = 311157;
+var summary = 'Comment-hiding compromise left E4X parsing/scanning inconsistent';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+printBugNumber (bug);
+printStatus (summary);
+
+try
+{
+    eval('var x = <hi> <![CDATA[ duh ]]>\n     there </hi>');
+}
+catch(e)
+{
+}
+
+reportCompare(expect, actual, summary);
+