Because we're in quirks mode, you should see a 100x100 green square below. If the square is only a couple of pixels wide or tall, then the test has failed. <div style="position:absolute; width:100px; top:50px;"> <div style="position:absolute;left:0px;top:50px;height:50px;background-color:green"> <table style="width:100%"><tr><td></table> </div> <div style="float:left; background-color:green; height:50px"> <table style="width:100%"><tr><td></table> </div> </div>