diff --git a/tests/benchmark/test_json_contains.py b/tests/benchmark/test_json_contains.py
index 87ecd3f3a..3ec2393b1 100644
--- a/tests/benchmark/test_json_contains.py
+++ b/tests/benchmark/test_json_contains.py
@@ -2,6 +2,7 @@
 import string
 
 import pytest
+
 from aiida import orm
 from aiida.orm.querybuilder import QueryBuilder