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Test Info:
<!DOCTYPE html>
<html class="reftest-wait">
<head>
<style>
div {
width: 200px;
height: 200px;
position:relative;
will-change: transform;
}
#one {
top:120px;
background-color:blue;
}
#two {
top: -200px;
left: 100px;
background-color:green;
z-index: 1;
}
</style>
</head>
<body>
<div id="one"></div>
<div id="two"></div>
</body>
<script>
function doTest() {
document.getElementById("two").style.zIndex = -1;
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</html>