1 files changed, 25 insertions, 0 deletions
diff --git a/testing/web-platform/tests/signed-exchange/sxg-invalid-utf8-inner-url.tentative.html b/testing/web-platform/tests/signed-exchange/sxg-invalid-utf8-inner-url.tentative.html
new file mode 100644
index 0000000000..7512d639e8
--- /dev/null
+++ b/testing/web-platform/tests/signed-exchange/sxg-invalid-utf8-inner-url.tentative.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<title>SignedHTTPExchange's fallback url must not have invalid UTF-8 sequence</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="./resources/sxg-util.js"></script>
+<body>
+<script>
+promise_test(async (t) => {
+  try {
+    const sxgUrl = get_host_info().HTTPS_ORIGIN + '/signed-exchange/resources/sxg/sxg-invalid-utf8-inner-url.sxg';
+    const message = await openSXGInIframeAndWaitForMessage(t, sxgUrl);
+    if (message.is_fallback) {
+        assert_unreached('Fallback redirect should not have happened');
+    } else {
+        assert_unreached('SXG should not have loaded');
+    }
+  } catch (e) {
+    assert_equals(e, 'timeout');
+  }
+}, "SignedHTTPExchange's fallback url must not have invalid UTF-8 sequence");
+
+</script>
+</body>