1 files changed, 2 insertions, 0 deletions
diff --git a/tests/oauth2/rfc6749/endpoints/test_client_authentication.py b/tests/oauth2/rfc6749/endpoints/test_client_authentication.py
index e9a0673..48c5f5a 100644
--- a/tests/oauth2/rfc6749/endpoints/test_client_authentication.py
+++ b/tests/oauth2/rfc6749/endpoints/test_client_authentication.py
@@ -32,6 +32,8 @@ class ClientAuthenticationTest(TestCase):
 
     def setUp(self):
         self.validator = mock.MagicMock(spec=RequestValidator)
+        self.validator.is_pkce_required.return_value = False
+        self.validator.get_code_challenge.return_value = None
         self.validator.get_default_redirect_uri.return_value = 'http://i.b./path'
         self.web = WebApplicationServer(self.validator,
                 token_generator=self.inspect_client)