diff --git a/python_tests/test_search_space.py b/python_tests/test_search_space.py
index 44b460ea..c03ed218 100644
--- a/python_tests/test_search_space.py
+++ b/python_tests/test_search_space.py
@@ -5,8 +5,8 @@ import warnings
 
 import optuna
 from optuna import create_trial
-from optuna.distributions import UniformDistribution
 from optuna.distributions import BaseDistribution
+from optuna.distributions import UniformDistribution
 from optuna.exceptions import ExperimentalWarning
 from optuna.trial import TrialState