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+<!DOCTYPE html>
+<html lang=en class="reftest-wait">
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Grid positioned item dynamic change.</title>
+<link rel="help" href="https://drafts.csswg.org/css-grid-2/#abspos">
+<link rel="match" href="grid-positioned-item-dynamic-change-004-ref.html">
+<meta name="assert" content="This test checks that positioned items can be dynamically changed.">
+<style>
+#grid {
+  display: grid;
+  width: 100px;
+  height: 100px;
+  position: relative;
+  border: solid;
+  grid-template: 50px 50px / 50px 50px;
+}
+
+#abspos {
+  position: absolute;
+  top: 0px;
+  left: 10px;
+  grid-area: 2 / 2 / 2 / 2;
+  width: 20px;
+  height: 20px;
+  background: lime;
+}
+</style>
+
+<body onload=updatePosition()>
+
+  <p>Test passes if it matches the reference.</p>
+
+  <div id="grid">
+    <div id="abspos"></div>
+  </div>
+
+</body>
+
+<script>
+  function updatePosition() {
+    document.body.offsetTop;
+
+    document.getElementById('abspos').style.top = '15px';
+    document.getElementById('abspos').style.left = '15px';
+
+    document.documentElement.classList.remove('reftest-wait');
+  }
+</script>
+
+</html>
+\ No newline at end of file