Follow up to e112654fc8

Actually comitted the code now :þ

tests/cache/tests.py

@@ -5,7 +5,6 @@
 from __future__ import unicode_literals
 
 import os
-import pickle
 import re
 import shutil
 import tempfile
@@ -32,6 +31,7 @@ from django.utils import timezone
 from django.utils import translation
 from django.utils.cache import (patch_vary_headers, get_cache_key,
     learn_cache_key, patch_cache_control, patch_response_headers)
+from django.utils.six.moves import cPickle as pickle
 from django.utils.encoding import force_text
 from django.views.decorators.cache import cache_page