diff --git a/api/controller/firmware_unittest.py b/api/controller/firmware_unittest.py
index 8df5dae..0b65c55 100644
--- a/api/controller/firmware_unittest.py
+++ b/api/controller/firmware_unittest.py
@@ -1,6 +1,7 @@
 # Copyright 2021 The ChromiumOS Authors
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """Unittests for Firmware operations."""
 
 import os