diff --git a/setup.py b/setup.py
index 45fbcdc..c6205e3 100644
--- a/setup.py
+++ b/setup.py
@@ -6,6 +6,7 @@
     PyScaffold helps you to put up the scaffold of your new Python project.
     Learn more under: https://pyscaffold.org/
 """
+
 from setuptools import setup
 
 if __name__ == "__main__":
diff --git a/src/pyscaffoldext/custom_extension/extension.py b/src/pyscaffoldext/custom_extension/extension.py
index 4fca6a6..d590beb 100644
--- a/src/pyscaffoldext/custom_extension/extension.py
+++ b/src/pyscaffoldext/custom_extension/extension.py
@@ -1,4 +1,5 @@
 """Main logic to create custom extensions"""
+
 from functools import partial, reduce
 from typing import List
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 3a40fb6..6827a27 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2,6 +2,7 @@
 A nice option is to put your ``autouse`` fixtures here.
 Functions that can be imported and re-used are more suitable for the ``helpers`` file.
 """
+
 import logging
 import os