diff -r 000000000000 -r 6474c204b198 dom/network/tests/unit_ipc/test_tcpsocket_ipc.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/network/tests/unit_ipc/test_tcpsocket_ipc.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+function run_test() {
+  Services.prefs.setBoolPref('dom.mozTCPSocket.enabled', true);
+  run_test_in_child("../unit/test_tcpsocket.js", function() {
+    Services.prefs.clearUserPref('dom.mozTCPSocket.enabled');
+    do_test_finished();
+  });
+}
\ No newline at end of file