diff --git a/django/contrib/humanize/tests.py b/django/contrib/humanize/tests.py
index 556c2ca2d0..d2bb4c034e 100644
--- a/django/contrib/humanize/tests.py
+++ b/django/contrib/humanize/tests.py
@@ -12,14 +12,12 @@ from django.conf import settings
 from django.contrib.humanize.templatetags import humanize
 from django.template import Template, Context, defaultfilters
 from django.test import TestCase
-from django.test.utils import override_settings
+from django.test.utils import override_settings, TransRealMixin
 from django.utils.html import escape
 from django.utils.timezone import utc, get_fixed_timezone
 from django.utils import translation
 from django.utils.translation import ugettext as _
 
-from i18n import TransRealMixin
-
 
 # Mock out datetime in some tests so they don't fail occasionally when they
 # run too slow. Use a fixed datetime for datetime.now(). DST change in
diff --git a/django/test/utils.py b/django/test/utils.py
index ae045a5283..9126142cf2 100644
--- a/django/test/utils.py
+++ b/django/test/utils.py
@@ -2,6 +2,7 @@ from contextlib import contextmanager
 import logging
 import re
 import sys
+from threading import local
 import time
 from unittest import skipUnless
 import warnings
@@ -415,6 +416,23 @@ def patch_logger(logger_name, log_level):
         setattr(logger, log_level, orig)
 
 
+class TransRealMixin(object):
+    """This is the only way to reset the translation machinery. Otherwise
+    the test suite occasionally fails because of global state pollution
+    between tests."""
+    def flush_caches(self):
+        from django.utils.translation import trans_real
+        trans_real._translations = {}
+        trans_real._active = local()
+        trans_real._default = None
+        trans_real._accepted = {}
+        trans_real._checked_languages = {}
+
+    def tearDown(self):
+        self.flush_caches()
+        super(TransRealMixin, self).tearDown()
+
+
 # On OSes that don't provide tzset (Windows), we can't set the timezone
 # in which the program runs. As a consequence, we must skip tests that
 # don't enforce a specific timezone (with timezone.override or equivalent),
diff --git a/tests/defaultfilters/tests.py b/tests/defaultfilters/tests.py
index 763628fe0e..c3288162e0 100644
--- a/tests/defaultfilters/tests.py
+++ b/tests/defaultfilters/tests.py
@@ -17,13 +17,12 @@ from django.template.defaultfilters import (
     urlize, urlizetrunc, wordcount, wordwrap, yesno,
 )
 from django.test import TestCase
+from django.test.utils import TransRealMixin
 from django.utils import six
 from django.utils import translation
 from django.utils.safestring import SafeData
 from django.utils.encoding import python_2_unicode_compatible
 
-from i18n import TransRealMixin
-
 
 class DefaultFiltersTests(TestCase):
 
diff --git a/tests/forms_tests/tests/test_regressions.py b/tests/forms_tests/tests/test_regressions.py
index e41e929fab..39459aa472 100644
--- a/tests/forms_tests/tests/test_regressions.py
+++ b/tests/forms_tests/tests/test_regressions.py
@@ -12,7 +12,7 @@ from django.test import TestCase
 from django.utils.translation import ugettext_lazy, override
 
 from forms_tests.models import Cheese
-from i18n import TransRealMixin
+from django.test.utils import TransRealMixin
 
 
 class FormsRegressionsTestCase(TransRealMixin, TestCase):
diff --git a/tests/i18n/__init__.py b/tests/i18n/__init__.py
index c5aaa31fe3..e69de29bb2 100644
--- a/tests/i18n/__init__.py
+++ b/tests/i18n/__init__.py
@@ -1,18 +0,0 @@
-from threading import local
-
-
-class TransRealMixin(object):
-    """This is the only way to reset the translation machinery. Otherwise
-    the test suite occasionally fails because of global state pollution
-    between tests."""
-    def flush_caches(self):
-        from django.utils.translation import trans_real
-        trans_real._translations = {}
-        trans_real._active = local()
-        trans_real._default = None
-        trans_real._accepted = {}
-        trans_real._checked_languages = {}
-
-    def tearDown(self):
-        self.flush_caches()
-        super(TransRealMixin, self).tearDown()
diff --git a/tests/i18n/contenttypes/tests.py b/tests/i18n/contenttypes/tests.py
index cbac9ec5da..c48f8fc6dd 100644
--- a/tests/i18n/contenttypes/tests.py
+++ b/tests/i18n/contenttypes/tests.py
@@ -5,13 +5,11 @@ import os
 
 from django.contrib.contenttypes.models import ContentType
 from django.test import TestCase
-from django.test.utils import override_settings
+from django.test.utils import override_settings, TransRealMixin
 from django.utils._os import upath
 from django.utils import six
 from django.utils import translation
 
-from i18n import TransRealMixin
-
 
 @override_settings(
     USE_I18N=True,
diff --git a/tests/i18n/tests.py b/tests/i18n/tests.py
index 1e16caeaad..1dbd502ed8 100644
--- a/tests/i18n/tests.py
+++ b/tests/i18n/tests.py
@@ -13,7 +13,7 @@ from django.core.management.utils import find_command
 from django.template import Template, Context
 from django.template.base import TemplateSyntaxError
 from django.test import TestCase, RequestFactory
-from django.test.utils import override_settings
+from django.test.utils import override_settings, TransRealMixin
 from django.utils import translation
 from django.utils.formats import (get_format, date_format, time_format,
     localize, localize_input, iter_format_modules, get_format_modules,
@@ -44,7 +44,6 @@ if find_command('msgfmt'):
     from .commands.compilation import (PoFileTests, PoFileContentsTests,
         PercentRenderingTests, MultipleLocaleCompilationTests,
         CompilationErrorHandling)
-from . import TransRealMixin
 from .forms import I18nForm, SelectDateForm, SelectDateWidget, CompanyForm
 from .models import Company, TestModel
 
diff --git a/tests/template_tests/tests.py b/tests/template_tests/tests.py
index ad6b4433da..55bb2e7b26 100644
--- a/tests/template_tests/tests.py
+++ b/tests/template_tests/tests.py
@@ -22,7 +22,7 @@ from django.template import (base as template_base, loader, Context,
 from django.template.loaders import app_directories, filesystem, cached
 from django.test import RequestFactory, TestCase
 from django.test.utils import (setup_test_template_loader,
-    restore_template_loaders, override_settings)
+    restore_template_loaders, override_settings, TransRealMixin)
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.formats import date_format
 from django.utils._os import upath
@@ -31,8 +31,6 @@ from django.utils.safestring import mark_safe
 from django.utils import six
 from django.utils.six.moves.urllib.parse import urljoin
 
-from i18n import TransRealMixin
-
 # NumPy installed?
 try:
     import numpy