diff --git a/manage/update_manifest.py b/manage/update_manifest.py
index 1691fec..ef199a4 100644
--- a/manage/update_manifest.py
+++ b/manage/update_manifest.py
@@ -1,4 +1,5 @@
 """Update the manifest file."""
+
 import sys
 import json
 import os
diff --git a/tests/hass_mocks.py b/tests/hass_mocks.py
index 521302f..21d0a52 100644
--- a/tests/hass_mocks.py
+++ b/tests/hass_mocks.py
@@ -1,4 +1,5 @@
 """Mock helpers."""
+
 from homeassistant.config_entries import ConfigEntry, SOURCE_USER
 from homeassistant.util import uuid as uuid_util
 
diff --git a/tests/timer_services_test.py b/tests/timer_services_test.py
index 8dae541..7fc620e 100644
--- a/tests/timer_services_test.py
+++ b/tests/timer_services_test.py
@@ -1,4 +1,5 @@
 """Timer services tests."""
+
 import asyncio
 from asyncio import Future
 from datetime import timedelta
diff --git a/tests/util_test.py b/tests/util_test.py
index 70be35d..ab7da83 100644
--- a/tests/util_test.py
+++ b/tests/util_test.py
@@ -1,4 +1,5 @@
 """Timer services tests."""
+
 from asyncio import Future
 from unittest.mock import patch, MagicMock