diff --git a/shards/conftest.py b/shards/conftest.py
index 24ec19da1d..aa4d409979 100644
--- a/shards/conftest.py
+++ b/shards/conftest.py
@@ -15,6 +15,7 @@ os.makedirs(dirpath, 0o777)
 settings.TestingConfig.SQLALCHEMY_DATABASE_URI = 'sqlite:///{}?check_same_thread=False'.format(
     filepath)
 
+
 @pytest.fixture
 def app(request):
     app = create_app(settings.TestingConfig)
diff --git a/shards/mishards/service_handler.py b/shards/mishards/service_handler.py
index 5e91c14f14..2f19152ae6 100644
--- a/shards/mishards/service_handler.py
+++ b/shards/mishards/service_handler.py
@@ -171,7 +171,7 @@ class ServiceHandler(milvus_pb2_grpc.MilvusServiceServicer):
         logger.info('HasTable {}'.format(_table_name))
 
         _status, _bool = self._has_table(_table_name,
-                                metadata={'resp_class': milvus_pb2.BoolReply})
+                                         metadata={'resp_class': milvus_pb2.BoolReply})
 
         return milvus_pb2.BoolReply(status=status_pb2.Status(
             error_code=_status.code, reason=_status.message),