diff --git a/backend/test_browser_tabs.py b/backend/test_browser_tabs.py
index f7fdad0..8d84c02 100644
--- a/backend/test_browser_tabs.py
+++ b/backend/test_browser_tabs.py
@@ -172,6 +172,8 @@ async def test_session_state_concurrency_with_popup(service, session):
             new_page = AsyncMock()
             new_page.on = MagicMock()
             new_page.is_closed = MagicMock(return_value=False)
+            new_page.url = "https://new.test"
+            new_page.bring_to_front = AsyncMock()
             service._handle_new_page(session, new_page)
         # Yield to let the registration task start (it will block on the lock)
         await asyncio.sleep(0.01)