diff --git a/html/browsers/the-window-object/window-open-no-browsing-context.html b/html/browsers/the-window-object/window-open-no-browsing-context.html
new file mode 100644
index 00000000000000..11d7153da96a25
--- /dev/null
+++ b/html/browsers/the-window-object/window-open-no-browsing-context.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>window.open() without a browsing context</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<script>
+test(() => {
+  const iframe = document.querySelector('iframe');
+  const win = iframe.contentWindow;
+  iframe.remove();
+  assert_equals(win.open(), null);
+});
+</script>
