diff --git a/ui/tests/jquery.simulate.js b/ui/tests/jquery.simulate.js
index d2c49ea89..f5168bf3b 100644
--- a/ui/tests/jquery.simulate.js
+++ b/ui/tests/jquery.simulate.js
@@ -112,7 +112,7 @@ $.extend($.simulate.prototype, {
 	
 	drag: function(el) {
 		var self = this, center = this.findCenter(this.target), 
-			options = this.options,	x = center.x, y = center.y, 
+			options = this.options,	x = Math.floor(center.x), y = Math.floor(center.y), 
 			dx = options.dx || 0, dy = options.dy || 0, target = this.target;
 		var coord = { clientX: x, clientY: y };
 		this.simulateEvent(target, "mouseover");