--- a/toolkit/components/passwordmgr/test/mochitest/test_prompt_noWindow.html
+++ b/toolkit/components/passwordmgr/test/mochitest/test_prompt_noWindow.html
@@ -31,17 +31,17 @@ runInParent(() => {
               createInstance(Ci.nsILoginInfo);
   login.init("http://mochi.test:8888", null, "mochitest",
              "mochiuser1", "mochipass1", "", "");
   Services.logins.addLogin(login);
 });
 
 add_task(function* test_sandbox_xhr() {
   let state = {
-    msg         : "http://mochi.test:8888 is requesting your username and password.\n\nThe site says: “mochitest”",
+    msg         : "http://mochi.test:8888 is requesting your username and password. The site says: “mochitest”",
     title       : "Authentication Required",
     textValue   : "mochiuser1",
     passValue   : "mochipass1",
     iconClass   : "authentication-icon question-icon",
     titleHidden : true,
     textHidden  : false,
     passHidden  : false,
     checkHidden : true,