1 files changed, 47 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-009.html b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-009.html
new file mode 100644
index 0000000000..d65a475233
--- /dev/null
+++ b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-009.html
@@ -0,0 +1,47 @@
+<!doctype HTML>
+<html class="reftest-wait">
+<meta charset="utf8">
+<title>CSS Content Visibility: hidden stops painting when added (positioned)</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
+<link rel="match" href="positioned-container-ref.html">
+<meta name="assert" content="content-visibility subtrees stop painting when hidden is added">
+
+<script src="/common/reftest-wait.js"></script>
+
+<style>
+#container {
+  width: 150px;
+  height: 150px;
+  background: lightblue;
+}
+.positioned {
+  position: absolute;
+  top: 0;
+  left: 0;
+}
+.hidden {
+  content-visibility: hidden;
+}
+#child {
+  width: 50px;
+  height: 50px;
+  background: red;
+}
+</style>
+
+<div id=container class=positioned>
+  Test fails if you can see this text or a red box.
+  <div id=child></div>
+</div>
+
+<script>
+function runTest() {
+  const container = document.getElementById("container");
+  container.classList.add("hidden");
+  requestAnimationFrame(takeScreenshot);
+}
+
+window.onload = runTest;
+</script>
+</html>