diff --git a/keystoneclient/common/cms.py b/keystoneclient/common/cms.py
index 19390f216..c5faf96d1 100644
--- a/keystoneclient/common/cms.py
+++ b/keystoneclient/common/cms.py
@@ -42,7 +42,7 @@ PKI_ASN1_FORM = 'PEM'
 
 # The openssl cms command exits with these status codes.
 # See https://www.openssl.org/docs/apps/cms.html#EXIT_CODES
-class OpensslCmsExitStatus:
+class OpensslCmsExitStatus(object):
     SUCCESS = 0
     INPUT_FILE_READ_ERROR = 2
     CREATE_CMS_READ_MIME_ERROR = 3
diff --git a/keystoneclient/middleware/auth_token.py b/keystoneclient/middleware/auth_token.py
index 43a7ea5c9..c8d1b083a 100644
--- a/keystoneclient/middleware/auth_token.py
+++ b/keystoneclient/middleware/auth_token.py
@@ -342,7 +342,7 @@ LIST_OF_VERSIONS_TO_ATTEMPT = ['v2.0', 'v3.0']
 CACHE_KEY_TEMPLATE = 'tokens/%s'
 
 
-class BIND_MODE:
+class BIND_MODE(object):
     DISABLED = 'disabled'
     PERMISSIVE = 'permissive'
     STRICT = 'strict'
diff --git a/tox.ini b/tox.ini
index 49586a554..a050f6ed1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,8 +34,7 @@ commands = oslo_debug_helper -t keystoneclient/tests {posargs}
 # H304: no relative imports
 # H405: multi line docstring summary not separated with an empty line
 # E122: continuation line missing indentation or outdented
-# New from hacking 0.10: H238
-ignore = H238,H304,H405,E122
+ignore = H304,H405,E122
 show-source = True
 exclude = .venv,.tox,dist,doc,*egg,build,*openstack/common*