<html class="reftest-wait">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body style="transform:translate(4px)">
<div id="invalid" style="width:100px; height:100px; background-color:red;"></div>
<script>
  function doTest() {
    document.documentElement.style.perspective = '100px';
    document.getElementById("invalid").style.backgroundColor = "green";
    document.documentElement.removeAttribute("class");
  }
  window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>