diff --git a/src/sirocco/core.py b/src/sirocco/core.py
index a411104..a856e4d 100644
--- a/src/sirocco/core.py
+++ b/src/sirocco/core.py
@@ -2,9 +2,9 @@
 
 import logging
 from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, Generic, Self, TypeVar
 from os.path import expandvars
 from pathlib import Path
+from typing import TYPE_CHECKING, Generic, Self, TypeVar
 
 from sirocco.parsing._yaml_data_models import (
     ConfigCycleTask,
diff --git a/src/sirocco/workgraph.py b/src/sirocco/workgraph.py
index 2bf9c73..ce447b3 100644
--- a/src/sirocco/workgraph.py
+++ b/src/sirocco/workgraph.py
@@ -9,7 +9,6 @@
 
 if TYPE_CHECKING:
     from aiida_workgraph.socket import TaskSocket  # type: ignore[import-untyped]
-
     from wcflow import core
 
 
@@ -173,7 +172,8 @@ def _add_aiida_task_node(self, task: core.UnrolledTask):
 
     def _link_wait_on_to_task(self, task: core.UnrolledTask):
         # TODO
-        raise NotImplementedError("")
+        msg = ""
+        raise NotImplementedError(msg)
         label = AiidaWorkGraph.get_aiida_label_from_unrolled_task(task)
         workgraph_task = self._aiida_task_nodes[label]
         wait_on_tasks = []
diff --git a/tests/test_wc_workflow.py b/tests/test_wc_workflow.py
index 4795744..b7efba8 100644
--- a/tests/test_wc_workflow.py
+++ b/tests/test_wc_workflow.py
@@ -3,8 +3,8 @@
 import pytest
 
 from sirocco.core import Workflow
-from sirocco.workgraph import AiidaWorkGraph
 from sirocco.pretty_print import PrettyPrinter
+from sirocco.workgraph import AiidaWorkGraph
 
 
 @pytest.fixture
@@ -17,7 +17,7 @@ def pprinter():
     "tests/files/configs/test_config_large.yml",
 ]
 
-def test_run_workgraph(config_case, aiida_profile):
+def test_run_workgraph(config_case, aiida_profile):  # noqa: ARG001
     config_path, _ = config_case
     core_workflow = Workflow.from_yaml(config_path)
     aiida_workflow = AiidaWorkGraph(core_workflow)