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<!DOCTYPE HTML>
<html class="reftest-wait">
<body>
<div style="column-count:2; width:300px; height:100px;">
<div id="o" style="opacity:0.5; width:100px; height:200px; background:lime;">
<div id="d" style="height:50px; width:80px; background:green; padding:2px">Text</div>
</div>
</div>
<script>
var o = document.getElementById("o");
var d = document.getElementById("d");
document.body.getBoundingClientRect();
o.style.opacity = 0.8;
function doTest() {
o.style.opacity = 0.9;
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>