Fixed #27579 -- Added aliases for Python 3's assertion names in SimpleTestCase.

1 files changed, 1 insertions, 2 deletions

diff --git a/tests/modeladmin/tests.py b/tests/modeladmin/tests.py
index 3ba497d100..ba75deff13 100644
--- a/tests/modeladmin/tests.py
+++ b/tests/modeladmin/tests.py
@@ -15,7 +15,6 @@ from django.core.checks import Error
 from django.forms.models import BaseModelFormSet
 from django.forms.widgets import Select
 from django.test import SimpleTestCase, TestCase
-from django.utils import six
 
 from .models import (
     Band, Concert, ValidationTestInlineModel, ValidationTestModel,
@@ -645,7 +644,7 @@ class CheckTestCase(SimpleTestCase):
         self.assertEqual(error.hint, hint)
         self.assertEqual(error.obj, invalid_obj)
         self.assertEqual(error.id, id)
-        six.assertRegex(self, error.msg, msg)
+        self.assertRegex(error.msg, msg)
 
     def assertIsValid(self, model_admin, model):
         admin_obj = model_admin(model, AdminSite())