diff --git a/tests/python_package_test/test_dual.py b/tests/python_package_test/test_dual.py
index ae78ba59a7d2..f517456dfa6e 100644
--- a/tests/python_package_test/test_dual.py
+++ b/tests/python_package_test/test_dual.py
@@ -2,13 +2,13 @@
 """Tests for dual GPU+CPU support."""
 
 import os
-import pytest
 
-import lightgbm as lgb
 import numpy as np
-
+import pytest
 from sklearn.metrics import log_loss
 
+import lightgbm as lgb
+
 from .utils import load_breast_cancer