diff --git a/keystone/tests/unit/test_v3_oauth1.py b/keystone/tests/unit/test_v3_oauth1.py
index 3a0d481c9c..cb28bf69de 100644
--- a/keystone/tests/unit/test_v3_oauth1.py
+++ b/keystone/tests/unit/test_v3_oauth1.py
@@ -874,7 +874,7 @@ class OAuthNotificationTests(OAuth1Tests,
 class OAuthCADFNotificationTests(OAuthNotificationTests):
 
     def setUp(self):
-        """Repeat the tests for CADF notifications """
+        """Repeat the tests for CADF notifications."""
         super(OAuthCADFNotificationTests, self).setUp()
         self.config_fixture.config(notification_format='cadf')
 
diff --git a/tox.ini b/tox.ini
index 470c75fe61..e15dfd365c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -114,10 +114,9 @@ show-source = true
 # D203: 1 blank required before class docstring.
 # D204: 1 blank required after class docstring
 # D205: Blank line required between one-line summary and description.
-# D210: No whitespaces allowed surrounding docstring text
 # D400: First line should end with a period.
 # D401: First line should be in imperative mood.
-ignore = H405,D100,D101,D102,D103,D104,D105,D200,D202,D203,D204,D205,D210,D400,D401
+ignore = H405,D100,D101,D102,D103,D104,D105,D200,D202,D203,D204,D205,D400,D401
 
 exclude=.venv,.git,.tox,build,dist,doc,*openstack/common*,*lib/python*,*egg,tools,vendor,.update-venv,*.ini,*.po,*.pot
 max-complexity=24