diff --git a/keystone/common/cache/_memcache_pool.py b/keystone/common/cache/_memcache_pool.py
index bc559781..2bfcc3bb 100644
--- a/keystone/common/cache/_memcache_pool.py
+++ b/keystone/common/cache/_memcache_pool.py
@@ -27,7 +27,7 @@ import time
 
 import memcache
 from oslo_log import log
-from six.moves import queue
+from six.moves import queue, zip
 
 from keystone import exception
 from keystone.i18n import _
diff --git a/keystone/tests/unit/test_cache_backend_mongo.py b/keystone/tests/unit/test_cache_backend_mongo.py
index 8afd5e8e..1d8b607d 100644
--- a/keystone/tests/unit/test_cache_backend_mongo.py
+++ b/keystone/tests/unit/test_cache_backend_mongo.py
@@ -20,6 +20,7 @@ import uuid
 from dogpile.cache import api
 from dogpile.cache import region as dp_region
 import six
+from six.moves import range
 
 from keystone.common.cache.backends import mongo
 from keystone import exception