Expose failing test

Signed-off-by: Kai A. Hiller <V02460@gmail.com>

tests/handlers/test_user_directory.py

@@ -458,9 +458,7 @@ def test_handle_user_deactivated_support_user(self) -> None:
             self.store, "remove_from_user_dir", mock_remove_from_user_dir
         ):
             self.get_success(self.handler.handle_local_user_deactivated(s_user_id))
-        # BUG: the correct spelling is assert_not_called, but that makes the test fail
-        # and it's not clear that this is actually the behaviour we want.
-        mock_remove_from_user_dir.not_called()
+        mock_remove_from_user_dir.assert_not_called()
 
     def test_handle_user_deactivated_regular_user(self) -> None:
         r_user_id = "@regular:test"