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diff --git a/testing/web-platform/tests/css/css-color/clip-opacity-out-of-flow.html b/testing/web-platform/tests/css/css-color/clip-opacity-out-of-flow.html
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+++ b/testing/web-platform/tests/css/css-color/clip-opacity-out-of-flow.html
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+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-color/#transparency">
+<link rel="help" href="https://drafts.csswg.org/css-position/#def-cb">
+<link rel="match" href="clip-opacity-out-of-flow-ref.html">
+<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-60000">
+<div style="overflow: hidden; width: 250px; height: 250px; will-change:transform">
+ <div style="overflow: hidden; width: 300px; height: 300px; transform: translateX(0)">
+ <div style="overflow: hidden; width: 200px; height: 200px">
+ <div style="width: 300px; height: 300px; background: red; opacity: 0.5">
+ <div style="width: 400px; height: 400px; background: yellow">
+ <!-- These out-of-flow positioned elements are not contained by the inner clip,
+ while the outer clip and the opacity still apply. The opacity should also
+ apply to all descendants as a single group. -->
+ <div style="position: absolute; width: 400px; height: 100px; background: blue"></div>
+ <div style="position: fixed; width: 100px; height: 400px; background: green"></div>
+ </div>
+ </div>
+ </div>
+</div>