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diff --git a/testing/web-platform/tests/html/semantics/popovers/popover-close-request.html b/testing/web-platform/tests/html/semantics/popovers/popover-close-request.html
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index 0000000000..830a40e060
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+++ b/testing/web-platform/tests/html/semantics/popovers/popover-close-request.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Popover close request behavior</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/top-layer.js"></script>
+<script src="/close-watcher/resources/helpers.js"></script>
+
+<div popover id=p1>
+  Inside popover 1
+  <div popover id=p2>Inside popover 2</div>
+</div>
+
+<script>
+promise_test(async () => {
+  const popover1 = document.querySelector('#p1');
+  const popover2 = document.querySelector('#p2');
+
+  popover1.showPopover();
+
+  // Bless the opening of popover2, so it doesn't get grouped with popover1 by
+  // the close watcher infrastructure.
+  await blessTopLayer(popover1);
+  popover2.showPopover();
+
+  assert_true(popover1.matches(':popover-open'), "Starting: popover1 must be open");
+  assert_true(popover2.matches(':popover-open'), "Starting: popover2 must be open");
+
+  await sendCloseRequest();
+  assert_true(popover1.matches(':popover-open'), "After one close request, popover1 must be open");
+  assert_false(popover2.matches(':popover-open'), "After one close request, popover2 must be closed");
+
+  await sendCloseRequest();
+  assert_false(popover1.matches(':popover-open'), "After two close requests, popover1 must be closed");
+  assert_false(popover2.matches(':popover-open'), "After two close requests, popover2 must be closed");
+});
+</script>