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diff --git a/testing/web-platform/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html b/testing/web-platform/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html
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index 0000000000..5b2aa2dd50
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+++ b/testing/web-platform/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html
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+<!DOCTYPE html>
+<title>Tests that scroll adjustments of fixed-positioned elements are applied correctly</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-fixedpos-002-ref.html">
+<style>
+body {
+  margin: 0;
+  height: 2000px;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#anchor {
+  position: fixed;
+  anchor-name: --a1;
+  margin: 300px;
+  background: orange;
+}
+
+#anchored {
+  position: fixed;
+  anchor-default: --a1;
+  left: anchor(--a1 right);
+  top: anchor(--a1 top);
+  background: green;
+}
+
+</style>
+
+<div id="anchor"></div>
+<div id="anchored"></div>
+
+<script>
+document.documentElement.scrollTop = 200;
+</script>