Add more missing type hints to tests. (#15028)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test_visibility.py b/tests/test_visibility.py

index d0b9ad5454..875e37988f 100644
--- a/tests/test_visibility.py
+++ b/tests/test_visibility.py
@@ -258,7 +258,7 @@ class FilterEventsForServerTestCase(unittest.HomeserverTestCase):
 
 
 class FilterEventsForClientTestCase(unittest.FederatingHomeserverTestCase):
-    def test_out_of_band_invite_rejection(self):
+    def test_out_of_band_invite_rejection(self) -> None:
         # this is where we have received an invite event over federation, and then
         # rejected it.
         invite_pdu = {