diff --git a/src/test/test.js b/src/test/test.js
index 716b48c42..1644e5800 100644
--- a/src/test/test.js
+++ b/src/test/test.js
@@ -21,7 +21,8 @@ describe('xterm.js', function() {
     };
     xterm.element = {
       classList: {
-        toggle: function(){}
+        toggle: function(){},
+        remove: function(){}
       }
     };
   });