diff --git a/html/browsers/the-window-object/document-attribute.window.js b/html/browsers/the-window-object/document-attribute.window.js
new file mode 100644
index 00000000000000..f13acdb8a32614
--- /dev/null
+++ b/html/browsers/the-window-object/document-attribute.window.js
@@ -0,0 +1,15 @@
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.onload = t.step_func(() => {
+    const frameW = frame.contentWindow,
+          frameD = frame.contentDocument;
+    assert_equals(frameW.document, frameD);
+    frame.remove();
+    assert_equals(frameW.document, frameD);
+    t.step_timeout(() => {
+      assert_equals(frameW.document, frameD);
+      t.done();
+    }, 100);
+  });
+  document.body.append(frame);
+}, "Window object's document IDL attribute and discarding the browsing context");