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diff --git a/testing/web-platform/tests/css/css-lists/inline-block-list-marker-ref.html b/testing/web-platform/tests/css/css-lists/inline-block-list-marker-ref.html
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+<!DOCTYPE html>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<head>
+  <meta charset="utf-8">
+  <title>CSS Reference: inline flow-root list-item with ::marker</title>
+  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<style>
+html,body {
+  color:black; background-color:white; font:14px/1 monospace; padding:0; margin:0;
+}
+ol,ul,li { margin:0; padding:0; }
+body { margin-left: 40px; }
+
+li { border: 1px solid; display: list-item; }
+li::marker { content: counters(list-item, ".") " "; }
+
+.wrap { width: 22ch; }
+.m { width: fit-content; }
+ib { display:inline-block; }
+</style>
+</head>
+<body>
+
+<div class="wrap">
+<li>A A A A A A A A A A A A A A A A A A A A </li>
+<li class=m>B</li>
+
+<ol>
+<li>A A A A A A A A A A A A A A A A A A A A </li>
+<ib><li class=m>B</li></ib>
+<ib><li class=m>C</li></ib>
+</ol>
+
+<ol style="display:inline">
+<ib><li>A A A A A A A A A A A A A A A A A A A A </li></ib>
+<ib><li class=m>B</li></ib>
+<ib><li class=m>C</li></ib>
+</ol>
+
+<ol style="display:inline">
+<li>A A A A A A A A A A A A A A A A A A A A </li>
+<li>B<ol>
+<li>a a a a a a a a a a a a a a a a a a a a </li>
+<li class=m>b</li>
+</ol></li>
+<li class=m>C</li>
+</ol>
+
+<ul>
+<li>A A A A A A A A A A A A A A A A A A A A </li>
+<li>B<ol style="display:inline">
+<li>a a a a a a a a a a a a a a a a a a a a </li>
+<li class=m>b</li>
+</ol></li>
+<li class=m>C</li>
+</ul>
+</div>
+
+</body>