diff --git a/heatclient/tests/unit/fakes.py b/heatclient/tests/unit/fakes.py
index 74ecf304..fca1ab99 100644
--- a/heatclient/tests/unit/fakes.py
+++ b/heatclient/tests/unit/fakes.py
@@ -211,23 +211,23 @@ def fake_headers():
             'User-Agent': 'python-heatclient'}
 
 
-class FakeServiceCatalog():
+class FakeServiceCatalog(object):
     def url_for(self, endpoint_type, service_type):
         return 'http://192.168.1.5:8004/v1/f14b41234'
 
 
-class FakeKeystone():
+class FakeKeystone(object):
     service_catalog = FakeServiceCatalog()
 
     def __init__(self, auth_token):
         self.auth_token = auth_token
 
 
-class FakeRaw():
+class FakeRaw(object):
     version = 110
 
 
-class FakeHTTPResponse():
+class FakeHTTPResponse(object):
 
     version = 1.1
 
diff --git a/heatclient/tests/unit/osc/fakes.py b/heatclient/tests/unit/osc/fakes.py
index 73865906..1fcd6e59 100644
--- a/heatclient/tests/unit/osc/fakes.py
+++ b/heatclient/tests/unit/osc/fakes.py
@@ -160,7 +160,7 @@ TEST_VERSIONS = {
 }
 
 
-class FakeStdout:
+class FakeStdout(object):
     def __init__(self):
         self.content = []
 
diff --git a/tox.ini b/tox.ini
index 230ebfe7..b9ee36f5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -42,7 +42,7 @@ commands=
 downloadcache = ~/cache/pip
 
 [flake8]
-ignore = E123,E126,E128,E241,E265,E713,H202,H238
+ignore = E123,E126,E128,E241,E265,E713,H202
 show-source = True
 exclude=.venv,.git,.tox,dist,*openstack/common*,*lib/python*,*egg,build
 max-complexity=20