diff --git a/landlock/__init__.py b/landlock/__init__.py
index 2b50a30..b7519e1 100644
--- a/landlock/__init__.py
+++ b/landlock/__init__.py
@@ -1,4 +1,5 @@
 """Python interface to the Landlock Linux Security Module."""
+
 from typing import Optional
 
 __version__ = "1.0.0.dev4"
diff --git a/landlock/plumbing.py b/landlock/plumbing.py
index 05ffcd2..efcc7c8 100644
--- a/landlock/plumbing.py
+++ b/landlock/plumbing.py
@@ -1,4 +1,5 @@
 """Landlock constants and syscalls."""
+
 import ctypes
 import enum
 import errno
diff --git a/tests/conftest.py b/tests/conftest.py
index cd02c1d..62668a4 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,5 @@
 """Test initialisation code run by pytest."""
+
 import platform
 from pathlib import Path
 
diff --git a/tests/test_simple.py b/tests/test_simple.py
index c48ad26..39b1083 100644
--- a/tests/test_simple.py
+++ b/tests/test_simple.py
@@ -1,4 +1,5 @@
 """Some simple tests for Landlock."""
+
 import platform
 from pathlib import Path
 
diff --git a/tests/test_unsupported_platforms.py b/tests/test_unsupported_platforms.py
index 5e6c42d..37b55b6 100644
--- a/tests/test_unsupported_platforms.py
+++ b/tests/test_unsupported_platforms.py
@@ -1,4 +1,5 @@
 """Tests Landlock on unsupported platforms (MacOS and Windows)."""
+
 import platform
 
 import pytest