diff --git a/django/contrib/auth/tests/auth_backends.py b/django/contrib/auth/tests/auth_backends.py
index 9a4d8f9b3a..b37de883d4 100644
--- a/django/contrib/auth/tests/auth_backends.py
+++ b/django/contrib/auth/tests/auth_backends.py
@@ -4,10 +4,11 @@ from django.conf import settings
 from django.contrib.auth.models import User, Group, Permission, AnonymousUser
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ImproperlyConfigured
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 
 
+@skipIfCustomUser
 class BackendTest(TestCase):
 
     backend = 'django.contrib.auth.backends.ModelBackend'
@@ -151,6 +152,7 @@ class SimpleRowlevelBackend(object):
             return ['none']
 
 
+@skipIfCustomUser
 class RowlevelBackendTest(TestCase):
     """
     Tests for auth backend that supports object level permissions
@@ -223,6 +225,7 @@ class AnonymousUserBackendTest(TestCase):
         self.assertEqual(self.user1.get_all_permissions(TestObj()), set(['anon']))
 
 
+@skipIfCustomUser
 @override_settings(AUTHENTICATION_BACKENDS=[])
 class NoBackendsTest(TestCase):
     """
@@ -235,6 +238,7 @@ class NoBackendsTest(TestCase):
         self.assertRaises(ImproperlyConfigured, self.user.has_perm, ('perm', TestObj(),))
 
 
+@skipIfCustomUser
 class InActiveUserBackendTest(TestCase):
     """
     Tests for a inactive user
diff --git a/django/contrib/auth/tests/basic.py b/django/contrib/auth/tests/basic.py
index 10adfc6a10..cee5dca62b 100644
--- a/django/contrib/auth/tests/basic.py
+++ b/django/contrib/auth/tests/basic.py
@@ -3,10 +3,11 @@ import locale
 from django.contrib.auth.management.commands import createsuperuser
 from django.contrib.auth.models import User, AnonymousUser
 from django.core.management import call_command
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.utils.six import StringIO
 
 
+@skipIfCustomUser
 class BasicTestCase(TestCase):
     def test_user(self):
         "Check that users can be created and can set their password"
diff --git a/django/contrib/auth/tests/context_processors.py b/django/contrib/auth/tests/context_processors.py
index 6c824e831b..a0da873f54 100644
--- a/django/contrib/auth/tests/context_processors.py
+++ b/django/contrib/auth/tests/context_processors.py
@@ -3,11 +3,11 @@ import os
 from django.conf import global_settings
 from django.contrib.auth import authenticate
 from django.db.models import Q
-from django.template import context
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 
 
+@skipIfCustomUser
 @override_settings(
     TEMPLATE_DIRS=(
             os.path.join(os.path.dirname(__file__), 'templates'),
diff --git a/django/contrib/auth/tests/decorators.py b/django/contrib/auth/tests/decorators.py
index bd3f0115f5..2ef043fdbc 100644
--- a/django/contrib/auth/tests/decorators.py
+++ b/django/contrib/auth/tests/decorators.py
@@ -1,7 +1,10 @@
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.contrib.auth.tests.views import AuthViewsTestCase
+from django.test import skipIfCustomUser
 
+
+@skipIfCustomUser
 class LoginRequiredTestCase(AuthViewsTestCase):
     """
     Tests the login_required decorators
diff --git a/django/contrib/auth/tests/forms.py b/django/contrib/auth/tests/forms.py
index 594b55c633..0b555e9f77 100644
--- a/django/contrib/auth/tests/forms.py
+++ b/django/contrib/auth/tests/forms.py
@@ -6,14 +6,14 @@ from django.contrib.auth.forms import (UserCreationForm, AuthenticationForm,
     PasswordChangeForm, SetPasswordForm, UserChangeForm, PasswordResetForm)
 from django.core import mail
 from django.forms.fields import Field, EmailField
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 from django.utils.encoding import force_text
-from django.utils import six
 from django.utils import translation
 from django.utils.translation import ugettext as _
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class UserCreationFormTest(TestCase):
 
@@ -81,6 +81,7 @@ class UserCreationFormTest(TestCase):
         self.assertEqual(repr(u), '<User: jsmith@example.com>')
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class AuthenticationFormTest(TestCase):
 
@@ -133,6 +134,7 @@ class AuthenticationFormTest(TestCase):
         self.assertEqual(form.non_field_errors(), [])
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class SetPasswordFormTest(TestCase):
 
@@ -160,6 +162,7 @@ class SetPasswordFormTest(TestCase):
         self.assertTrue(form.is_valid())
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class PasswordChangeFormTest(TestCase):
 
@@ -208,6 +211,7 @@ class PasswordChangeFormTest(TestCase):
                          ['old_password', 'new_password1', 'new_password2'])
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class UserChangeFormTest(TestCase):
 
@@ -255,6 +259,7 @@ class UserChangeFormTest(TestCase):
         form.as_table()
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class PasswordResetFormTest(TestCase):
 
diff --git a/django/contrib/auth/tests/management.py b/django/contrib/auth/tests/management.py
index b93f695a20..783dd38642 100644
--- a/django/contrib/auth/tests/management.py
+++ b/django/contrib/auth/tests/management.py
@@ -7,12 +7,13 @@ from django.contrib.auth.models import User
 from django.contrib.auth.tests import CustomUser
 from django.core.management import call_command
 from django.core.management.base import CommandError
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 from django.utils import six
 from django.utils.six import StringIO
 
 
+@skipIfCustomUser
 class GetDefaultUsernameTestCase(TestCase):
 
     def setUp(self):
@@ -41,6 +42,7 @@ class GetDefaultUsernameTestCase(TestCase):
         self.assertEqual(management.get_default_username(), 'julia')
 
 
+@skipIfCustomUser
 class ChangepasswordManagementCommandTestCase(TestCase):
 
     def setUp(self):
@@ -76,6 +78,7 @@ class ChangepasswordManagementCommandTestCase(TestCase):
             command.execute("joe", stdout=self.stdout, stderr=self.stderr)
 
 
+@skipIfCustomUser
 class CreatesuperuserManagementCommandTestCase(TestCase):
 
     def test_createsuperuser(self):
diff --git a/django/contrib/auth/tests/models.py b/django/contrib/auth/tests/models.py
index b40157bfe2..f0e6c0368d 100644
--- a/django/contrib/auth/tests/models.py
+++ b/django/contrib/auth/tests/models.py
@@ -1,10 +1,11 @@
 from django.conf import settings
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 from django.contrib.auth.models import (Group, User,
     SiteProfileNotAvailable, UserManager)
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, AUTH_PROFILE_MODULE='')
 class ProfileTestCase(TestCase):
 
@@ -30,6 +31,7 @@ class ProfileTestCase(TestCase):
             user.get_profile()
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False)
 class NaturalKeysTestCase(TestCase):
     fixtures = ['authtestdata.json']
@@ -44,6 +46,7 @@ class NaturalKeysTestCase(TestCase):
         self.assertEqual(Group.objects.get_by_natural_key('users'), users_group)
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False)
 class LoadDataWithoutNaturalKeysTestCase(TestCase):
     fixtures = ['regular.json']
@@ -54,6 +57,7 @@ class LoadDataWithoutNaturalKeysTestCase(TestCase):
         self.assertEqual(group, user.groups.get())
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False)
 class LoadDataWithNaturalKeysTestCase(TestCase):
     fixtures = ['natural.json']
@@ -64,6 +68,7 @@ class LoadDataWithNaturalKeysTestCase(TestCase):
         self.assertEqual(group, user.groups.get())
 
 
+@skipIfCustomUser
 class UserManagerTestCase(TestCase):
 
     def test_create_user(self):
diff --git a/django/contrib/auth/tests/remote_user.py b/django/contrib/auth/tests/remote_user.py
index fa324781d2..f74239b68f 100644
--- a/django/contrib/auth/tests/remote_user.py
+++ b/django/contrib/auth/tests/remote_user.py
@@ -3,10 +3,11 @@ from datetime import datetime
 from django.conf import settings
 from django.contrib.auth.backends import RemoteUserBackend
 from django.contrib.auth.models import User
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.utils import timezone
 
 
+@skipIfCustomUser
 class RemoteUserTest(TestCase):
 
     urls = 'django.contrib.auth.tests.urls'
@@ -106,6 +107,7 @@ class RemoteUserNoCreateBackend(RemoteUserBackend):
     create_unknown_user = False
 
 
+@skipIfCustomUser
 class RemoteUserNoCreateTest(RemoteUserTest):
     """
     Contains the same tests as RemoteUserTest, but using a custom auth backend
@@ -142,6 +144,7 @@ class CustomRemoteUserBackend(RemoteUserBackend):
         return user
 
 
+@skipIfCustomUser
 class RemoteUserCustomTest(RemoteUserTest):
     """
     Tests a custom RemoteUserBackend subclass that overrides the clean_username
diff --git a/django/contrib/auth/tests/signals.py b/django/contrib/auth/tests/signals.py
index 51f14d35f0..af2da8c93e 100644
--- a/django/contrib/auth/tests/signals.py
+++ b/django/contrib/auth/tests/signals.py
@@ -1,8 +1,9 @@
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 from django.contrib.auth import signals
 
 
+@skipIfCustomUser
 @override_settings(USE_TZ=False, PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class SignalTestCase(TestCase):
     urls = 'django.contrib.auth.tests.urls'
diff --git a/django/contrib/auth/tests/tokens.py b/django/contrib/auth/tests/tokens.py
index 44117a4f84..0db0fdad0d 100644
--- a/django/contrib/auth/tests/tokens.py
+++ b/django/contrib/auth/tests/tokens.py
@@ -4,10 +4,11 @@ from datetime import date, timedelta
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.contrib.auth.tokens import PasswordResetTokenGenerator
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.utils import unittest
 
 
+@skipIfCustomUser
 class TokenGeneratorTest(TestCase):
 
     def test_make_token(self):
diff --git a/django/contrib/auth/tests/views.py b/django/contrib/auth/tests/views.py
index 3c847f456a..05db1857f2 100644
--- a/django/contrib/auth/tests/views.py
+++ b/django/contrib/auth/tests/views.py
@@ -10,7 +10,7 @@ from django.http import QueryDict
 from django.utils.encoding import force_text
 from django.utils.html import escape
 from django.utils.http import urlquote
-from django.test import TestCase
+from django.test import TestCase, skipIfCustomUser
 from django.test.utils import override_settings
 
 from django.contrib.auth import SESSION_KEY, REDIRECT_FIELD_NAME
@@ -49,6 +49,7 @@ class AuthViewsTestCase(TestCase):
         return self.assertContains(response, escape(force_text(text)), **kwargs)
 
 
+@skipIfCustomUser
 class AuthViewNamedURLTests(AuthViewsTestCase):
     urls = 'django.contrib.auth.urls'
 
@@ -74,6 +75,7 @@ class AuthViewNamedURLTests(AuthViewsTestCase):
                 self.fail("Reversal of url named '%s' failed with NoReverseMatch" % name)
 
 
+@skipIfCustomUser
 class PasswordResetTest(AuthViewsTestCase):
 
     def test_email_not_found(self):
@@ -171,6 +173,7 @@ class PasswordResetTest(AuthViewsTestCase):
         self.assertContainsEscaped(response, SetPasswordForm.error_messages['password_mismatch'])
 
 
+@skipIfCustomUser
 class ChangePasswordTest(AuthViewsTestCase):
 
     def fail_login(self, password='password'):
@@ -230,6 +233,7 @@ class ChangePasswordTest(AuthViewsTestCase):
             self.assertTrue(response['Location'].endswith('/login/?next=/password_change/done/'))
 
 
+@skipIfCustomUser
 class LoginTest(AuthViewsTestCase):
 
     def test_current_site_in_context_after_login(self):
@@ -288,6 +292,7 @@ class LoginTest(AuthViewsTestCase):
                             "%s should be allowed" % good_url)
 
 
+@skipIfCustomUser
 class LoginURLSettings(AuthViewsTestCase):
 
     def setUp(self):
@@ -346,6 +351,7 @@ class LoginURLSettings(AuthViewsTestCase):
                                                     querystring.urlencode('/')))
 
 
+@skipIfCustomUser
 class LogoutTest(AuthViewsTestCase):
 
     def confirm_logged_out(self):
diff --git a/django/test/__init__.py b/django/test/__init__.py
index 21a4841a6b..58814ce107 100644
--- a/django/test/__init__.py
+++ b/django/test/__init__.py
@@ -5,5 +5,6 @@ Django Unit Test and Doctest framework.
 from django.test.client import Client, RequestFactory
 from django.test.testcases import (TestCase, TransactionTestCase,
     SimpleTestCase, LiveServerTestCase, skipIfDBFeature,
-    skipUnlessDBFeature)
+    skipUnlessDBFeature, skipIfCustomUser
+)
 from django.test.utils import Approximate
diff --git a/django/test/testcases.py b/django/test/testcases.py
index f12c431d3a..ec08a28a9d 100644
--- a/django/test/testcases.py
+++ b/django/test/testcases.py
@@ -44,10 +44,12 @@ from django.utils import unittest as ut2
 from django.utils.encoding import force_text
 from django.utils import six
 from django.utils.unittest.util import safe_repr
+from django.utils.unittest import skipIf
 from django.views.static import serve
 
 __all__ = ('DocTestRunner', 'OutputChecker', 'TestCase', 'TransactionTestCase',
-           'SimpleTestCase', 'skipIfDBFeature', 'skipUnlessDBFeature')
+           'SimpleTestCase', 'skipIfDBFeature', 'skipUnlessDBFeature',
+           'skipIfCustomUser')
 
 normalize_long_ints = lambda s: re.sub(r'(?<![\w])(\d+)L(?![\w])', '\\1', s)
 normalize_decimals = lambda s: re.sub(r"Decimal\('(\d+(\.\d*)?)'\)",
@@ -906,6 +908,13 @@ def skipUnlessDBFeature(feature):
                          "Database doesn't support feature %s" % feature)
 
 
+def skipIfCustomUser(test_func):
+    """
+    Skip a test if a custom user model is in use.
+    """
+    return skipIf(settings.AUTH_USER_MODEL != 'auth.User', 'Custom user model in use')(test_func)
+
+
 class QuietWSGIRequestHandler(WSGIRequestHandler):
     """
     Just a regular WSGIRequestHandler except it doesn't log to the standard