--- a/testing/talos/talos/tests/devtools/addon/content/damp.js
+++ b/testing/talos/talos/tests/devtools/addon/content/damp.js
@@ -76,16 +76,17 @@ function awaitBrowserLoaded(browser, inc
     });
   });
 }
 
 /* globals res:true */
 
 function Damp() {
   Services.prefs.setBoolPref("devtools.webconsole.new-frontend-enabled", true);
+  Services.prefs.setBoolPref("devtools.inspector.show-three-pane-tooltip", false);
 }
 
 Damp.prototype = {
   async garbageCollect() {
     dump("Garbage collect\n");
 
     // Minimize memory usage
     // mimic miminizeMemoryUsage, by only flushing JS objects via GC.