diff --git a/gamepad/gamepad-tests.ts b/gamepad/gamepad-tests.ts
index 7491d7970e..e6ca9d272a 100644
--- a/gamepad/gamepad-tests.ts
+++ b/gamepad/gamepad-tests.ts
@@ -18,7 +18,7 @@
     window.requestAnimationFrame(runAnimation);
 };
 
-()=>{
+(()=>{
     window.addEventListener('GamepadConnected', (e: GamepadEvent)=>{
         console.log('Gamepad ' + e.gamepad.index + ' connected!');
     }, false);
@@ -69,4 +69,4 @@
 
         runAnimation();
     }
-}();
\ No newline at end of file
+})();
\ No newline at end of file