diff --git a/toolkit/components/social/test/browser/browser_frameworker.js b/toolkit/components/social/test/browser/browser_frameworker.js
index 3954ac2e9048..8131c56c9398 100644
--- a/toolkit/components/social/test/browser/browser_frameworker.js
+++ b/toolkit/components/social/test/browser/browser_frameworker.js
@@ -346,7 +346,7 @@ let tests = {
         let port = e.ports[0];
 
         try {
-          var exampleSocket = new WebSocket("ws://www.example.com/socketserver");
+          var exampleSocket = new WebSocket("ws://mochi.test:8888/socketserver");
         } catch (e) {
           port.postMessage({topic: "done", result: "FAILED calling WebSocket constructor: " + e});
           return;