diff --git a/test/legacy.mouse.shim.js b/test/legacy.mouse.shim.js
index 460a8dfe..7a8ff7cc 100644
--- a/test/legacy.mouse.shim.js
+++ b/test/legacy.mouse.shim.js
@@ -11,14 +11,8 @@
         $.MouseTracker.subscribeEvents.push( "MozMousePixelScroll" );
     }
 
-    $.MouseTracker.subscribeEvents.push( "mousedown", "mouseup", "mousemove" );
-    if ( 'onmouseenter' in window ) {
-        $.MouseTracker.subscribeEvents.push( "mouseenter", "mouseleave" );
-        $.MouseTracker.haveMouseEnter = true;
-    } else {
-        $.MouseTracker.subscribeEvents.push( "mouseover", "mouseout" );
-        $.MouseTracker.haveMouseEnter = false;
-    }
+    $.MouseTracker.subscribeEvents.push( "mouseover", "mouseout", "mousedown", "mouseup", "mousemove" );
+    $.MouseTracker.haveMouseEnter = false;
     if ( 'ontouchstart' in window ) {
         // iOS, Android, and other W3c Touch Event implementations (see http://www.w3.org/TR/2011/WD-touch-events-20110505)
         $.MouseTracker.subscribeEvents.push( "touchstart", "touchend", "touchmove", "touchcancel" );