diff --git a/js/listeners/KeyboardListenerTests.ts b/js/listeners/KeyboardListenerTests.ts
index e04f6947e..bf5a2a2ff 100644
--- a/js/listeners/KeyboardListenerTests.ts
+++ b/js/listeners/KeyboardListenerTests.ts
@@ -241,27 +241,4 @@ QUnit.test( 'KeyboardListener Tests', assert => {
 
   document.body.removeChild( display.domElement );
   display.dispose();
-} );
-
-//
-// QUnit.test( 'KeyboardListener Callback timing', assert => {
-//   const rootNode = new Node( { tagName: 'div' } );
-//   const display = new Display( rootNode );
-//   display.initializeEvents();
-//   document.body.appendChild( display.domElement );
-//
-//
-//   //
-//   // a -> callback timer
-//   //
-//   // wait
-//   // b -> callback timer
-//   //
-//   // release before b
-//   //
-//   // ensure a fires
-//
-//
-//   document.body.removeChild( display.domElement );
-//   display.dispose();
-// });
\ No newline at end of file
+} );
\ No newline at end of file