diff -r 000000000000 -r 6474c204b198 python/mozbuild/mozpack/test/support/minify_js_verify.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/python/mozbuild/mozpack/test/support/minify_js_verify.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+# 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/.
+
+import sys
+
+
+if len(sys.argv) != 4:
+    raise Exception('Usage: minify_js_verify <exitcode> <orig> <minified>')
+
+sys.exit(int(sys.argv[1]))