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diff --git a/testing/web-platform/tests/css/CSS2/stacking-context/opacity-change-parent-stacking-context.html b/testing/web-platform/tests/css/CSS2/stacking-context/opacity-change-parent-stacking-context.html
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+<!doctype HTML>
+<html class="reftest-wait">
+ <title>CSS Test: Test for re-paint after stacking context removal due to opacity</title>
+ <link rel="author" title="Chris Harrelson" href="mailto:chrishtr@chromium.org" />
+ <link rel="help" href="https://www.w3.org/TR/CSS2/zindex.html">
+ <link rel="match" href="opacity-change-parent-stacking-context-ref.html">
+ <script src="/common/reftest-wait.js"></script>
+ <div style="width: 100px; height: 100px; background: lightblue; will-change: transform; position: absolute">
+ <div id=target style="opacity: 0; backface-visibility: hidden">
+ <div style="width: 50px; height: 50px; background: lightgray; top: 75px; position: relative"></div>
+ </div>
+ </div>
+ <script>
+ onload = function() {
+ requestAnimationFrame(() => requestAnimationFrame(() => {
+ target.style.opacity = 1;
+ takeScreenshot();
+ }));
+ }
+ </script>
+</html>