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+++ b/testing/web-platform/tests/css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-001.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Self-Alignment along row axis of stcky positioned items</title>
+<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#row-align">
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
+<link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-justify-self">
+<link rel="stylesheet" href="../../support/alignment.css">
+<meta name="assert" content="Sticky positioned grid items are aligned correcly.">
+<style>
+.container {
+  border: solid 1px;
+  overflow: auto;
+  width: 500px;
+}
+.grid {
+  position: relative;
+  display: grid;
+  grid-template-columns: 100px 100px 100px 300px;
+  grid-template-rows: 75px 75px 75px 75px;
+  background: grey;
+  width: 400px;
+  margin-bottom: 20px;
+}
+.sticky {
+  position: -webkit-sticky;
+  position: sticky;
+  width: 20px;
+  height: 20px;
+  background-color: #cae8ca;
+}
+.item1 {
+  left: 0px;
+  grid-column: 1;
+  grid-row: 1;
+}
+.item2 {
+  left: 0px;
+  grid-column: 2;
+  grid-row: 2;
+}
+.item3 {
+  left: 0px;
+  grid-column: 3;
+  grid-row: 3;
+}
+.item4 {
+  grid-column: 4;
+  grid-row: 4;
+  background: lightgrey;
+}
+.scroll { overflow: auto; }
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+<div class="container">
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="280" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 30px; float:left; height: 10px;"></div>
+    <div class="grid scroll">
+        <div class="item1 sticky justifySelfStart"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item2 sticky justifySelfCenter" data-offset-x="140" data-offset-y="75"></div>
+        <div class="item3 sticky justifySelfEnd"    data-offset-x="280" data-offset-y="150"></div>
+        <div class="item4"></div>
+    </div>
+    <div style="width: 2000px; height: 10px;"></div>
+</div>
+</body>