[py3] Replaced basestring by six.string_types.

1 files changed, 2 insertions, 1 deletions

diff --git a/django/test/utils.py b/django/test/utils.py
index ca4a5e7474..4b121bdfb0 100644
--- a/django/test/utils.py
+++ b/django/test/utils.py
@@ -6,6 +6,7 @@ from django.template import Template, loader, TemplateDoesNotExist
 from django.template.loaders import cached
 from django.utils.translation import deactivate
 from django.utils.functional import wraps
+from django.utils import six
 
 
 __all__ = (
@@ -35,7 +36,7 @@ class ContextList(list):
     in a list of context objects.
     """
     def __getitem__(self, key):
-        if isinstance(key, basestring):
+        if isinstance(key, six.string_types):
             for subcontext in self:
                 if key in subcontext:
                     return subcontext[key]