1 files changed, 18 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-unsandboxed.tentative.sub.window.js b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-unsandboxed.tentative.sub.window.js
new file mode 100644
index 0000000000..7fe80dfa1b
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-grandchild-unsandboxed.tentative.sub.window.js
@@ -0,0 +1,18 @@
+// META: title=Top-level navigation tests with grandchild frames
+// 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', '', '');
+
+  await attemptTopNavigation(iframe_2, true);
+}, 'An unsandboxed same-origin grandchild can navigate top');