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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<style>
.scene {
transform-style: preserve-3d;
}
.hidden {
backface-visibility: hidden;
}
#inner {
width: 20px;
height: 20px;
}
</style>
<script type="text/javascript">
function doTest() {
document.getElementById("inner").style.boxShadow = "rgb(255, 205, 31) 0px 0px 0px 3px";
document.documentElement.removeAttribute('class');
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</head>
<body>
<div class="scene">
<div class="hidden">
<div id="inner">
</div>
</div>
</div
</body>