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diff --git a/testing/web-platform/tests/css/css-contain/container-queries/get-animations.html b/testing/web-platform/tests/css/css-contain/container-queries/get-animations.html
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+++ b/testing/web-platform/tests/css/css-contain/container-queries/get-animations.html
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+<!doctype html>
+<title>getAnimations depending on container query</title>
+<link rel="help" href="https://drafts.csswg.org/css-contain-3/#animated-containers">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/cq-testcommon.js"></script>
+<style>
+  #container {
+    container-type: inline-size;
+    width: 100px;
+  }
+  #div { color: red; }
+  @keyframes test {
+    from { color: green; }
+    to { color: green; }
+  }
+  @container (min-width: 200px) {
+    #div { animation: test 1s linear forwards; }
+  }
+</style>
+<div id=container>
+  <div id=div>Green</div>
+</div>
+<script>
+  setup(() => assert_implements_container_queries());
+
+  test(() => {
+    assert_equals(getComputedStyle(div).color, 'rgb(255, 0, 0)');
+
+    container.style = 'width:300px';
+    assert_equals(div.getAnimations().length, 1);
+    assert_equals(getComputedStyle(div).color, 'rgb(0, 128, 0)');
+  }, 'Calling getAnimations updates layout of parent frame if needed');
+</script>