diff --git a/mozilla/layout/mathml/tests/core.xml b/mozilla/layout/mathml/tests/core.xml
deleted file mode 100644
index 81e78527aa6..00000000000
--- a/mozilla/layout/mathml/tests/core.xml
+++ /dev/null
@@ -1,193 +0,0 @@
-
-
-
-
-
-Testing MathML msub:
-
-
-
-
-Testing MathML msup:
-
-
-Testing MathML mrow:
-
-
-
-
-
-
-and then piling fractions with a user-defined line thickness...
-
-
-
-
-
-
-, with this mfrac hanging here
-
-
-in the middle of a lot of running text to try to explain what this means to those who care
-to read.
-
-
-
diff --git a/mozilla/layout/mathml/tests/mathml.css b/mozilla/layout/mathml/tests/mathml.css
deleted file mode 100644
index f4a70ed6ff0..00000000000
--- a/mozilla/layout/mathml/tests/mathml.css
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * 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 Mozilla MathML Project.
- *
- * The Initial Developer of the Original Code is The University Of
- * Queensland. Portions created by The University Of Queensland are
- * Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
- *
- * Contributor(s):
- * Roger B. Sidje
- */
-
-
-/*******************************************************/
-/* namespace for MathML elements */
-/*******************************************************/
-
-@namespace mathml url(http://www.w3.org/1998/Math/MathML);
-
-
-/*******************************************************/
-/*