diff --git a/examples/audio_controller_class_example.py b/examples/audio_controller_class_example.py
index 92adaa9..e87784c 100644
--- a/examples/audio_controller_class_example.py
+++ b/examples/audio_controller_class_example.py
@@ -2,6 +2,7 @@
 Per session GetMute() SetMute() GetMasterVolume() SetMasterVolume() using
 SimpleAudioVolume.
 """
+
 from pycaw.pycaw import AudioUtilities
 
 
diff --git a/examples/audio_endpoint_volume_example.py b/examples/audio_endpoint_volume_example.py
index f857af8..c94e055 100644
--- a/examples/audio_endpoint_volume_example.py
+++ b/examples/audio_endpoint_volume_example.py
@@ -1,6 +1,7 @@
 """
 Get and set access to master volume example.
 """
+
 from comtypes import CLSCTX_ALL
 
 from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume
diff --git a/examples/session_callback_example.py b/examples/session_callback_example.py
index 4a2d153..2a0163c 100644
--- a/examples/session_callback_example.py
+++ b/examples/session_callback_example.py
@@ -20,6 +20,7 @@
 https://docs.microsoft.com/en-us/windows/win32/api/audiopolicy/nn-audiopolicy-iaudiosessionevents
 
 """
+
 import time
 
 from comtypes import COMError
diff --git a/examples/simple_audio_volume_example.py b/examples/simple_audio_volume_example.py
index fa94ed9..eed5b78 100644
--- a/examples/simple_audio_volume_example.py
+++ b/examples/simple_audio_volume_example.py
@@ -1,6 +1,7 @@
 """
 Per session GetMute() SetMute() using ISimpleAudioVolume.
 """
+
 from pycaw.pycaw import AudioUtilities, ISimpleAudioVolume
 
 
diff --git a/examples/volume_by_process_example.py b/examples/volume_by_process_example.py
index a9f1b7c..3ec709e 100644
--- a/examples/volume_by_process_example.py
+++ b/examples/volume_by_process_example.py
@@ -1,6 +1,7 @@
 """
 Mutes the volume of all processes, but unmutes chrome.exe process.
 """
+
 from pycaw.pycaw import AudioUtilities
 
 
diff --git a/examples/volume_callback_example.py b/examples/volume_callback_example.py
index d199eb5..e27b60c 100644
--- a/examples/volume_callback_example.py
+++ b/examples/volume_callback_example.py
@@ -2,6 +2,7 @@
 IAudioEndpointVolumeCallback.OnNotify() example.
 The OnNotify() callback method gets called on volume change.
 """
+
 from comtypes import CLSCTX_ALL, COMObject
 
 from pycaw.pycaw import (
diff --git a/pycaw/pycaw.py b/pycaw/pycaw.py
index 0f2f826..e4339eb 100644
--- a/pycaw/pycaw.py
+++ b/pycaw/pycaw.py
@@ -1,6 +1,7 @@
 """
 Python wrapper around the Core Audio Windows API.
 """
+
 # import here all newly split up modules,
 # to keep backwards compatibility
 
diff --git a/tests/test_core.py b/tests/test_core.py
index 5448c81..437aa4a 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1,6 +1,7 @@
 """
 Verifies core features run as expected.
 """
+
 import sys
 import warnings
 from contextlib import contextmanager
diff --git a/tests/test_examples.py b/tests/test_examples.py
index f229c35..8c53e73 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -1,6 +1,7 @@
 """
 Verifies examples run as expected.
 """
+
 import pytest
 
 from examples import (