diff --git a/tests/conftest.py b/tests/conftest.py
index f65af18647..8fb32eaa83 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -18,11 +18,11 @@
 import dataclasses
 import os
 import pathlib
+import subprocess
 import types
 import typing as t
 import warnings
 from pathlib import Path
-import subprocess
 
 import click
 import pytest
@@ -862,14 +862,16 @@ def factory(dirpath: pathlib.Path, read_bytes=True) -> dict:
 
     return factory
 
+
 @pytest.fixture
 def bash_path() -> Path:
-    run_process = subprocess.run(["which", "bash"], capture_output=True, check=True)
+    run_process = subprocess.run(['which', 'bash'], capture_output=True, check=True)
     path = run_process.stdout.decode('utf-8').strip()
     return Path(path)
 
+
 @pytest.fixture
 def cat_path() -> Path:
-    run_process = subprocess.run(["which", "cat"], capture_output=True, check=True)
+    run_process = subprocess.run(['which', 'cat'], capture_output=True, check=True)
     path = run_process.stdout.decode('utf-8').strip()
     return Path(path)
diff --git a/tests/tools/pytest_fixtures/test_configuration.py b/tests/tools/pytest_fixtures/test_configuration.py
index c960c21d55..09bd20cbee 100644
--- a/tests/tools/pytest_fixtures/test_configuration.py
+++ b/tests/tools/pytest_fixtures/test_configuration.py
@@ -1,6 +1,5 @@
 """Test the pytest fixtures."""
 
-import tempfile
 
 
 def test_aiida_config(tmp_path):