diff --git a/plinth/modules/coturn/components.py b/plinth/modules/coturn/components.py
index 8b8b7372d..b7f91a27f 100644
--- a/plinth/modules/coturn/components.py
+++ b/plinth/modules/coturn/components.py
@@ -73,7 +73,7 @@ class TurnConsumer(app.FollowerComponent):
         self._all[component_id] = self
 
     @classmethod
-    def list(cls) -> List[TurnConsumer]:
+    def list(cls) -> List[TurnConsumer]:  # noqa
         """Return a list of all Coturn components."""
         return cls._all.values()
 
diff --git a/plinth/modules/matrixsynapse/tests/test_turn_config.py b/plinth/modules/matrixsynapse/tests/test_turn_config.py
index bda46c72f..09f239fc6 100644
--- a/plinth/modules/matrixsynapse/tests/test_turn_config.py
+++ b/plinth/modules/matrixsynapse/tests/test_turn_config.py
@@ -3,7 +3,7 @@
 Test module for Matrix Synapse STUN/TURN configuration.
 """
 
-from unittest.mock import patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
@@ -25,6 +25,9 @@ def fixture_test_configuration(call_action, managed_turn_conf_file,
               overridden_turn_conf_file), \
         patch('plinth.modules.matrixsynapse.is_setup', return_value=True), \
             patch('plinth.actions.superuser_run', call_action):
+        helper = MagicMock()
+        helper.get_state.return_value = 'up-to-date'
+        matrixsynapse.setup_helper = helper
         yield