diff --git a/tests/python_package_test/test_utilities.py b/tests/python_package_test/test_utilities.py
index 6e861d0aec50..510b72bfe28c 100644
--- a/tests/python_package_test/test_utilities.py
+++ b/tests/python_package_test/test_utilities.py
@@ -2,6 +2,7 @@
 import logging
 
 import numpy as np
+
 import lightgbm as lgb