Add missing type hints to tests.replication. (#14987)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/replication/test_module_cache_invalidation.py b/tests/replication/test_module_cache_invalidation.py

index b93cae67d3..9c4fbda71b 100644
--- a/tests/replication/test_module_cache_invalidation.py
+++ b/tests/replication/test_module_cache_invalidation.py
@@ -39,7 +39,7 @@ class ModuleCacheInvalidationTestCase(BaseMultiWorkerStreamTestCase):
         synapse.rest.admin.register_servlets,
     ]
 
-    def test_module_cache_full_invalidation(self):
+    def test_module_cache_full_invalidation(self) -> None:
         main_cache = TestCache()
         self.hs.get_module_api().register_cached_function(main_cache.cached_function)