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+<!DOCTYPE HTML>
+<title>CSS Test (Transforms): 3D Rendering Context following DOM Tree (absolute positioning)</title>
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="author" title="Google" href="http://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#3d-rendering-contexts">
+<meta name="assert" content="Absolutely positioned elements participate in 3D Rendering Contexts based on their parent, not their containing block.">
+<link rel="match" href="reference/green.html">
+
+<style>
+
+div {
+ width: 100px;
+ height: 100px;
+}
+
+.cb {
+ transform-style: preserve-3d;
+ background: red;
+ position: relative;
+}
+
+.parent {
+}
+
+.abspos {
+ position: absolute;
+ top: 0;
+ left: 0;
+ /* Since this element is not in the 3D Rendering Context, this translation
+ does not put it above the <div class="sibling">. */
+ transform: translateZ(20px);
+ background: red;
+}
+
+.sibling {
+ position: absolute;
+ top: 0;
+ left: 0;
+ transform: translateZ(10px);
+ background: green;
+}
+
+</style>
+
+<p>Pass if there is NO red below:</p>
+
+<div class="cb">
+ <div class="parent">
+ <div class="abspos">
+ </div>
+ </div>
+ <div class="sibling">
+ </div>
+</div>