diff --git a/tests/frontend/specs/undo.js b/tests/frontend/specs/undo.js
index 6fed22e38..0c58c9b84 100644
--- a/tests/frontend/specs/undo.js
+++ b/tests/frontend/specs/undo.js
@@ -44,7 +44,7 @@ describe("undo button", function(){
     var modifiedValue = $firstTextElement.text(); // get the modified value
     expect(modifiedValue).not.to.be(originalValue); // expect the value to change
 
-    if(!inner$.browser.firefox){
+    if(inner$.browser.mozilla){ // if it's a mozilla browser
       var evtType = "keypress";
     }else{
       var evtType = "keydown";