diff --git a/tests/python_client/testcases/stability/test_mysql.py b/tests/python_client/testcases/stability/test_mysql.py
index b5f140d9be..b898fe7b42 100644
--- a/tests/python_client/testcases/stability/test_mysql.py
+++ b/tests/python_client/testcases/stability/test_mysql.py
@@ -10,12 +10,14 @@ from pymilvus import IndexType
 from utils.utils import get_milvus, gen_vectors, default_dim
 from common.common_type import CaseLabel
 
+
 class TestMysql:
     """
     ******************************************************************
       The following cases are used to test mysql failure
     ******************************************************************
     """
+
     @pytest.fixture(scope="function", autouse=True)
     def skip_check(self, connect, args):
         if args["service_name"].find("shards") != -1: