diff -r 000000000000 -r 6474c204b198 testing/mochitest/pywebsocket_wrapper.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mochitest/pywebsocket_wrapper.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+#
+# 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/.
+#
+
+"""A wrapper around pywebsocket's standalone.py which causes it to ignore
+SIGINT.
+
+"""
+
+import signal
+import sys
+
+if __name__ == '__main__':
+    sys.path = ['pywebsocket'] + sys.path
+    import standalone
+
+    # If we received --interactive as the first argument, ignore SIGINT so
+    # pywebsocket doesn't die on a ctrl+c meant for the debugger.  Otherwise,
+    # die immediately on SIGINT so we don't print a messy backtrace.
+    if len(sys.argv) >= 2 and sys.argv[1] == '--interactive':
+        del sys.argv[1]
+        signal.signal(signal.SIGINT, signal.SIG_IGN)
+    else:
+        signal.signal(signal.SIGINT, lambda signum, frame: sys.exit(1))
+
+    standalone._main()