diff --git a/neutron/agent/linux/dhcp.py b/neutron/agent/linux/dhcp.py
index f3d8e81460..8850306e7b 100644
--- a/neutron/agent/linux/dhcp.py
+++ b/neutron/agent/linux/dhcp.py
@@ -21,7 +21,6 @@ import os
 import re
 import shutil
 import socket
-import StringIO
 import sys
 import uuid
 
@@ -413,7 +412,7 @@ class Dnsmasq(DhcpLocalProcess):
     def _output_hosts_file(self):
         """Writes a dnsmasq compatible hosts file."""
         r = re.compile('[:.]')
-        buf = StringIO.StringIO()
+        buf = six.StringIO()
 
         for port in self.network.ports:
             for alloc in port.fixed_ips:
diff --git a/neutron/tests/unit/test_policy.py b/neutron/tests/unit/test_policy.py
index 22a7ccad6a..81fe7dfad5 100644
--- a/neutron/tests/unit/test_policy.py
+++ b/neutron/tests/unit/test_policy.py
@@ -16,11 +16,11 @@
 """Test of Policy Engine For Neutron"""
 
 import json
-import StringIO
 import urllib2
 
 import fixtures
 import mock
+import six
 
 import neutron
 from neutron.api.v2 import attributes
@@ -120,7 +120,7 @@ class PolicyTestCase(base.BaseTestCase):
     def test_enforce_http_true(self):
 
         def fakeurlopen(url, post_data):
-            return StringIO.StringIO("True")
+            return six.StringIO("True")
 
         with mock.patch.object(urllib2, 'urlopen', new=fakeurlopen):
             action = "example:get_http"
@@ -131,7 +131,7 @@ class PolicyTestCase(base.BaseTestCase):
     def test_enforce_http_false(self):
 
         def fakeurlopen(url, post_data):
-            return StringIO.StringIO("False")
+            return six.StringIO("False")
 
         with mock.patch.object(urllib2, 'urlopen', new=fakeurlopen):
             action = "example:get_http"