glean.patch

diff --git toolkit/components/glean/tests/xpcshell/test_FOGPrefs.js toolkit/components/glean/tests/xpcshell/test_FOGPrefs.js
index 6cfeec020da69..227e1bbbdeee4 100644
--- toolkit/components/glean/tests/xpcshell/test_FOGPrefs.js
+++ toolkit/components/glean/tests/xpcshell/test_FOGPrefs.js
@@ -9,14 +9,17 @@ const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
 // FOG needs a profile directory to put its data in.
 do_get_profile();
 
-const FOG = Cc["@mozilla.org/toolkit/glean;1"].createInstance(Ci.nsIFOG);
-// We need to initialize it once, otherwise operations will be stuck in the pre-init queue.
-FOG.initializeFOG();
-
 const TELEMETRY_SERVER_PREF = "toolkit.telemetry.server";
 const UPLOAD_PREF = "datareporting.healthreport.uploadEnabled";
 const LOCALHOST_PREF = "telemetry.fog.test.localhost_port";
 
+const FOG = Cc["@mozilla.org/toolkit/glean;1"].createInstance(Ci.nsIFOG);
+// We want Glean to use a localhost server so we can be SURE not to send data to the outside world.
+// Yes, the port spells GLEAN on a T9 keyboard, why do you ask?
+Services.prefs.setIntPref(LOCALHOST_PREF, 45326);
+// We need to initialize it once, otherwise operations will be stuck in the pre-init queue.
+FOG.initializeFOG();
+
 add_task(function test_fog_upload_only() {
   // Don't forget to point the telemetry server to localhost, or Telemetry
   // might make a non-local connection during the test run.