diff --git a/wgkex/worker/mqtt_test.py b/wgkex/worker/mqtt_test.py
index 314a48d..1bf76b1 100644
--- a/wgkex/worker/mqtt_test.py
+++ b/wgkex/worker/mqtt_test.py
@@ -133,7 +133,9 @@ def test_publish_metrics_loop_success(self, conn_peers_mock, config_mock):
     @mock.patch.object(mqtt, "get_connected_peers_count")
     def test_publish_metrics_NetlinkDumpInterrupted(self, conn_peers_mock, config_mock):
         config_mock.return_value = _get_config_mock()
-        conn_peers_mock.side_effect = pyroute2.netlink.exceptions.NetlinkDumpInterrupted()
+        conn_peers_mock.side_effect = (
+            pyroute2.netlink.exceptions.NetlinkDumpInterrupted()
+        )
         mqtt_client = mock.MagicMock(spec=paho.mqtt.client.Client)
 
         domain = mqtt.get_config().domains[0]