diff --git a/tests/test_router_circular_import.py b/tests/test_router_circular_import.py
index dfec8d24c..d2ac71b29 100644
--- a/tests/test_router_circular_import.py
+++ b/tests/test_router_circular_import.py
@@ -8,4 +8,4 @@ def test_router_circular_import():
 
     app.include_router(router)
     with pytest.raises(AssertionError, match="Router cannot be the same as parent"):
-        router.include_router(router)
\ No newline at end of file
+        router.include_router(router)