diff --git a/letsencrypt/client/tests/auth_handler_test.py b/letsencrypt/client/tests/auth_handler_test.py
index 137b1627e..2125b4882 100644
--- a/letsencrypt/client/tests/auth_handler_test.py
+++ b/letsencrypt/client/tests/auth_handler_test.py
@@ -25,8 +25,8 @@ class SatisfyChallengesTest(unittest.TestCase):
     def setUp(self):
         from letsencrypt.client.auth_handler import AuthHandler
 
-        self.mock_dv_auth = mock.MagicMock(name='ApacheConfigurator')
-        self.mock_client_auth = mock.MagicMock(name='ClientAuthenticator')
+        self.mock_dv_auth = mock.MagicMock(name="ApacheConfigurator")
+        self.mock_client_auth = mock.MagicMock(name="ClientAuthenticator")
 
         self.mock_dv_auth.get_chall_pref.return_value = ["dvsni"]
         self.mock_client_auth.get_chall_pref.return_value = ["recoveryToken"]
@@ -293,8 +293,8 @@ class GetAuthorizationsTest(unittest.TestCase):
     def setUp(self):
         from letsencrypt.client.auth_handler import AuthHandler
 
-        self.mock_dv_auth = mock.MagicMock(name='ApacheConfigurator')
-        self.mock_client_auth = mock.MagicMock(name='ClientAuthenticator')
+        self.mock_dv_auth = mock.MagicMock(name="ApacheConfigurator")
+        self.mock_client_auth = mock.MagicMock(name="ClientAuthenticator")
 
         self.mock_sat_chall = mock.MagicMock(name="_satisfy_challenges")
         self.mock_acme_auth = mock.MagicMock(name="acme_authorization")
@@ -484,5 +484,5 @@ def gen_path(str_list, challenges):
     return path
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()