diff --git a/playwright/_impl/_frame.py b/playwright/_impl/_frame.py
index 2cfbb7240..2ce4372b6 100644
--- a/playwright/_impl/_frame.py
+++ b/playwright/_impl/_frame.py
@@ -156,7 +156,7 @@ def _setup_navigation_waiter(self, wait_name: str, timeout: float = None) -> Wai
         waiter.reject_on_event(
             self._page,
             "close",
-            lambda: cast(Page, self._page)._close_error_with_reason(),
+            lambda: cast("Page", self._page)._close_error_with_reason(),
         )
         waiter.reject_on_event(
             self._page, "crash", Error("Navigation failed because page crashed!")