diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 74c7705c970..a94c0963ec1 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -41,8 +41,8 @@ INSTALL_REQUIRES = (
     'grpcio>={version}'.format(version=grpc_version.VERSION),
     'grpcio-tools>={version}'.format(version=grpc_version.VERSION),
     'grpcio-health-checking>={version}'.format(version=grpc_version.VERSION),
-    'oauth2client>=1.4.7', 'protobuf>=3.6.0', 'six>=1.10',
-    'google-auth>=1.0.0', 'requests>=2.14.2')
+    'oauth2client>=1.4.7', 'protobuf>=3.6.0', 'six>=1.10', 'google-auth>=1.0.0',
+    'requests>=2.14.2')
 
 if not PY3:
     INSTALL_REQUIRES += ('futures>=2.2.0',)