<!DOCTYPE html> <html class="reftest-wait"> <head> <script> function f() { document.body.style.fontSize = "20px"; // End the test asynchronously so we get a chance to do a reflow before // that happens. setTimeout("document.documentElement.className = ''", 0); } </script> <style> span { display: inline-block; width: 1em; height: 10px; background: green; } </style> </head> <body onload="f()" style="position: relative; font-size: 10px"> Test <div style="position: absolute; left: 0; width: 25px; height: 0; top: 0;"> <span></span> <span></span> </div> </body> </html>