diff --git a/tests/laborious/activities/test_opc.py b/tests/laborious/activities/test_opc.py
index c4c9051..4d1a86a 100644
--- a/tests/laborious/activities/test_opc.py
+++ b/tests/laborious/activities/test_opc.py
@@ -336,6 +336,7 @@ async def test_manage_output_tags_failed(opc, side_effect):
         ]
     )
 
+
 @mark.asyncio
 async def test_manage_output_tags_do_nothing(opc):
     opc.write_data = AsyncMock(return_value=0.1)
@@ -344,12 +345,16 @@ async def test_manage_output_tags_do_nothing(opc):
         '_invalid_key': {'tag1': {'data_type': 'float'}},
     }
     output_data, opc_metrics = await opc.manage_output_tags(
-        server_id='server1', config=config, data=data, metadata=metadata['metadata'],
+        server_id='server1',
+        config=config,
+        data=data,
+        metadata=metadata['metadata'],
     )
     assert output_data is True
     assert opc_metrics == {}
     opc.write_data.assert_not_called()
 
+
 @mark.asyncio
 @patch('laborious.activities.opc.DataFrame')
 async def test_write_opc_data_success(mock_dataframe, opc):