1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-allow-same-origin.tentative.sub.window.js b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-allow-same-origin.tentative.sub.window.js
new file mode 100644
index 0000000000..2be6cd66a7
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-allow-same-origin.tentative.sub.window.js
@@ -0,0 +1,20 @@
+// META: title=Top-level navigation tests with frames that try to give themselves top-nav permission
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/sandbox-top-navigation-helper.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const main = await setupTest();
+  const iframe_1 = await createNestedIframe(main, 'HTTP_ORIGIN', '', '');
+  const iframe_2 = await createNestedIframe(
+      iframe_1, 'HTTP_ORIGIN', '', 'allow-same-origin allow-top-navigation');
+
+  await attemptTopNavigation(iframe_2, true);
+}, 'A sandboxed same-origin grandchild with allow-same-origin can \
+    give itself top-nav privileges');