1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webmessaging/postMessage_CryptoKey_insecure.sub.html b/testing/web-platform/tests/webmessaging/postMessage_CryptoKey_insecure.sub.html
new file mode 100644
index 0000000000..8e5bdcb9c6
--- /dev/null
+++ b/testing/web-platform/tests/webmessaging/postMessage_CryptoKey_insecure.sub.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<body>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+promise_test(async t => {
+  let nextMessageEvent = new Promise((resolve, reject) => {
+    window.addEventListener('message', e => resolve(e));
+    window.addEventListener('messageerror', e => resolve(e));
+  });
+  let w = window.open('https://{{hosts[][]}}:{{ports[https][0]}}/webmessaging/resources/post-cryptokey-to-opener.html');
+  try {
+    let event = await nextMessageEvent;
+    assert_equals(event.type, 'messageerror');
+  } finally {
+    w.close();
+  }
+}, "insecure context should not receive an object for secure contexts only");
+</script>
+</body>