diff --git a/.pep8 b/.pep8
index 4ad0546..d8b79ea 100644
--- a/.pep8
+++ b/.pep8
@@ -1,3 +1,3 @@
 [flake8]
-ignore = E501
+ignore = E501,W503
 exclude = south_migrations,migrations,.venv_*,docs
diff --git a/.travis.yml b/.travis.yml
index b357bb1..091bf66 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,10 +3,6 @@ services: memcached
 
 matrix:
   include:
-  - python: "2.7"
-    env: TOX_ENV=py27-django111
-  - python: "3.6"
-    env: TOX_ENV=py36-django111
   - python: "3.6"
     env: TOX_ENV=py36-django20
   - python: "3.6"
diff --git a/CHANGES b/CHANGES
index efa42ed..f3bf884 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,8 @@ Version 0.9.5 (unreleased)
 * Added Kyrgyz translation (#239,thanks @Soyuzbek)
 * Ignore translator context hints checking unmatched variables (#238, #239, thanks @jeancochrane and @mondeja)
 * Uncheck fuzzy on translation keyup instead of change (#235 @mondeja)
+* Allow passing a function itself to the setting ROSETTA_ACCESS_CONTROL (#227, thanks @alvra)
+* Dropped support for Django 1.11 and Python 2
 
 
 Version 0.9.4
diff --git a/docs/settings.rst b/docs/settings.rst
index face5ba..abf055d 100644
--- a/docs/settings.rst
+++ b/docs/settings.rst
@@ -13,7 +13,7 @@ Rosetta can be configured via the following parameters, to be defined in your pr
 * ``ROSETTA_REQUIRES_AUTH``: Require authentication for all Rosetta views. Defaults to ``True``.
 * ``ROSETTA_POFILE_WRAP_WIDTH``: Sets the line-length of the edited PO file. Set this to ``0`` to mimic ``makemessage``'s ``--no-wrap`` option. Defaults to ``78``.
 * ``ROSETTA_STORAGE_CLASS``: See the note below on Storages. Defaults to ``rosetta.storage.CacheRosettaStorage``
-* ``ROSETTA_ACCESS_CONTROL_FUNCTION``: An alternative function that determines if a given user can access the translation views. This function receives a ``user`` as its argument, and returns a boolean specifying whether the passed user is allowed to use Rosetta or not.
+* ``ROSETTA_ACCESS_CONTROL_FUNCTION``: An alternative function (string or a callable) that determines if a given user can access the translation views. This function receives a ``user`` as its argument, and returns a boolean specifying whether the passed user is allowed to use Rosetta or not.
 * ``ROSETTA_LANGUAGE_GROUPS``: Set to ``True`` to enable language-specific groups, which can be used to give different translators access to different languages. Instead of creating a global ``translators`` group, create individual per-language groups, e.g. ``translators-de``, ``translators-fr``, and assign users to these.
 * ``ROSETTA_CACHE_NAME``: When using ``rosetta.storage.CacheRosettaStorage``, you can store the Rosetta data in a specific cache. This is particularly useful when your ``default`` cache is a ``django.core.cache.backends.dummy.DummyCache`` (which happens on pre-production environments). If unset, it will default to ``rosetta`` if a cache with this name exists, or ``default`` if not.
 * ``ROSETTA_POFILENAMES``: Defines which po file names are exposed in the web interface. Defaults to ``('django.po', 'djangojs.po')``
diff --git a/rosetta/tests/tests.py b/rosetta/tests/tests.py
index d3c28ab..3fd2189 100644
--- a/rosetta/tests/tests.py
+++ b/rosetta/tests/tests.py
@@ -1,34 +1,27 @@
-# -*- coding: utf-8 -*-
 import filecmp
 import hashlib
 import os
 import shutil
-import vcr
-try:
-    # Python 3
-    from urllib.parse import urlencode
-except ImportError:
-    # Python 2
-    from urllib import urlencode
+from urllib.parse import urlencode
 
-from django.conf import settings
-from django.dispatch import receiver
-from django.core.exceptions import ImproperlyConfigured
-from django.http import Http404
-from django.test import TestCase, RequestFactory, override_settings
-from django.test.client import Client
 from django import VERSION
-from django.urls import reverse, resolve
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+from django.dispatch import receiver
+from django.http import Http404
+from django.test import RequestFactory, TestCase, override_settings
+from django.test.client import Client
+from django.urls import resolve, reverse
 from django.utils.encoding import force_bytes
-import six
 
+import six
+import vcr
+from rosetta import views
 from rosetta.signals import entry_changed, post_save
 from rosetta.storage import get_storage
-from rosetta import views
 
 
 class RosettaTestCase(TestCase):
-
     def __init__(self, *args, **kwargs):
         super(RosettaTestCase, self).__init__(*args, **kwargs)
         self.curdir = os.path.dirname(__file__)
@@ -39,9 +32,15 @@ class RosettaTestCase(TestCase):
     def setUp(self):
         from django.contrib.auth.models import User
 
-        user = User.objects.create_superuser('test_admin', 'test@test.com', 'test_password')
-        user2 = User.objects.create_superuser('test_admin2', 'test@test2.com', 'test_password')
-        user3 = User.objects.create_superuser('test_admin3', 'test@test2.com', 'test_password')
+        user = User.objects.create_superuser(
+            'test_admin', 'test@test.com', 'test_password'
+        )
+        user2 = User.objects.create_superuser(
+            'test_admin2', 'test@test2.com', 'test_password'
+        )
+        user3 = User.objects.create_superuser(
+            'test_admin3', 'test@test2.com', 'test_password'
+        )
 
         user3.is_staff = False
         user3.save()
@@ -84,15 +83,14 @@ class RosettaTestCase(TestCase):
     def test_1_ListLoading(self):
         r = self.client.get(self.third_party_file_list_url)
         self.assertTrue(
-            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po') in str(r.content)
+            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po')
+            in r.content.decode()
         )
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_2_PickFile(self):
         r = self.client.get(self.xx_form_url)
-        self.assertTrue('dummy language' in str(r.content))
+        self.assertTrue('dummy language' in r.content.decode())
 
     def test_3_DownloadZIP(self):
         kwargs = {'po_filter': 'third-party', 'lang_id': 'xx', 'idx': 0}
@@ -101,9 +99,7 @@ class RosettaTestCase(TestCase):
         self.assertTrue('content-type' in r._headers.keys())
         self.assertTrue('application/x-zip' in r._headers.get('content-type'))
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_4_DoChanges(self):
         self.copy_po_file_from_template('./django.po.template')
         untranslated_url = self.xx_form_url + '?msg_filter=untranslated'
@@ -113,10 +109,10 @@ class RosettaTestCase(TestCase):
         r = self.client.get(untranslated_url)
 
         # make sure both strings are untranslated
-        self.assertTrue('dummy language' in str(r.content))
-        self.assertTrue('String 1' in str(r.content))
-        self.assertTrue('String 2' in str(r.content))
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+        self.assertTrue('dummy language' in r.content.decode())
+        self.assertTrue('String 1' in r.content.decode())
+        self.assertTrue('String 2' in r.content.decode())
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
@@ -126,20 +122,18 @@ class RosettaTestCase(TestCase):
         r = self.client.get(untranslated_url)
 
         # the translated string no longer is up for translation
-        self.assertTrue('String 1' in str(r.content))
-        self.assertTrue('String 2' not in str(r.content))
+        self.assertTrue('String 1' in r.content.decode())
+        self.assertTrue('String 2' not in r.content.decode())
 
         # display only translated strings
         r = self.client.get(translated_url)
 
         # The translation was persisted
-        self.assertTrue('String 1' not in str(r.content))
-        self.assertTrue('String 2' in str(r.content))
-        self.assertTrue('Hello, world' in str(r.content))
+        self.assertTrue('String 1' not in r.content.decode())
+        self.assertTrue('String 2' in r.content.decode())
+        self.assertTrue('Hello, world' in r.content.decode())
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_5_TestIssue67(self):
         # issue 67: http://code.google.com/p/django-rosetta/issues/detail?id=67
         self.copy_po_file_from_template('./django.po.issue67.template')
@@ -149,15 +143,15 @@ class RosettaTestCase(TestCase):
             content = f_.read()
         self.assertTrue('Hello, world' not in six.text_type(content))
         self.assertTrue('|| n%100>=20) ? 1 : 2)' in six.text_type(content))
-        del(content)
+        del content
 
         r = self.client.get(self.xx_form_url + '?msg_filter=untranslated')
 
         # make sure all strings are untranslated
-        self.assertTrue('dummy language' in str(r.content))
-        self.assertTrue('String 1' in str(r.content))
-        self.assertTrue('String 2' in str(r.content))
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+        self.assertTrue('dummy language' in r.content.decode())
+        self.assertTrue('String 1' in r.content.decode())
+        self.assertTrue('String 2' in r.content.decode())
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
@@ -169,13 +163,11 @@ class RosettaTestCase(TestCase):
         self.assertTrue('Hello, world' in str(content))
         self.assertTrue('|| n%100>=20) ? 1 : 2)' in str(content))
         self.assertTrue('or n%100>=20) ? 1 : 2)' not in str(content))
-        del(content)
+        del content
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_6_ExcludedApps(self):
-        with self.settings(ROSETTA_EXCLUDED_APPLICATIONS=('rosetta', )):
+        with self.settings(ROSETTA_EXCLUDED_APPLICATIONS=('rosetta',)):
             r = self.client.get(self.third_party_file_list_url)
             self.assertNotContains(r, 'rosetta/locale/xx/LC_MESSAGES/django.po')
 
@@ -190,17 +182,15 @@ class RosettaTestCase(TestCase):
         r = self.client.get(self.project_file_list_url)
         self.assertNotContains(r, 'rosetta/locale/xx/LC_MESSAGES/django.po')
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_8_hideObsoletes(self):
         r = self.client.get(self.xx_form_url)
 
         # not in listing
         for p in range(1, 5):
             r = self.client.get(self.xx_form_url + '?page=%d' % p)
-            self.assertTrue('dummy language' in str(r.content))
-            self.assertTrue('Les deux' not in str(r.content))
+            self.assertTrue('dummy language' in r.content.decode())
+            self.assertTrue('Les deux' not in r.content.decode())
 
         r = self.client.get(self.xx_form_url + '?query=Les%20Deux')
         self.assertContains(r, 'dummy language')
@@ -278,7 +268,7 @@ class RosettaTestCase(TestCase):
 
     def test_11_issue_80_tab_indexes(self):
         r = self.client.get(self.xx_form_url)
-        self.assertTrue('tabindex="3"' in str(r.content))
+        self.assertTrue('tabindex="3"' in r.content.decode())
 
     def test_12_issue_82_staff_user(self):
         self.client3 = Client()
@@ -297,37 +287,37 @@ class RosettaTestCase(TestCase):
             self.assertTrue(r.content)
             self.assertEqual(r.status_code, 200)
 
-    @override_settings(ROSETTA_LANGUAGES=(('fr', 'French'), ('xx', 'Dummy Language'),))
+    @override_settings(ROSETTA_LANGUAGES=(('fr', 'French'), ('xx', 'Dummy Language')))
     def test_13_catalog_filters(self):
         r = self.client.get(self.third_party_file_list_url)
         self.assertTrue(
-            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po') in str(r.content)
+            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po')
+            in r.content.decode()
         )
-        self.assertTrue(('contrib') not in str(r.content))
 
         url = reverse('rosetta-file-list', kwargs={'po_filter': 'django'})
         r = self.client.get(url)
         self.assertTrue(
-            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po') not in str(r.content)
+            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po')
+            not in r.content.decode()
         )
-        self.assertTrue(('contrib') in str(r.content))
 
         r = self.client.get(self.all_file_list_url)
         self.assertTrue(
-            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po') in str(r.content)
+            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po')
+            in r.content.decode()
         )
-        self.assertTrue(('contrib') in str(r.content))
 
         r = self.client.get(self.project_file_list_url)
         self.assertTrue(
-            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po') not in str(r.content)
+            os.path.normpath('rosetta/locale/xx/LC_MESSAGES/django.po')
+            not in r.content.decode()
         )
-        self.assertTrue(('contrib') not in str(r.content))
 
     def test_14_issue_99_context_and_comments(self):
         r = self.client.get(self.xx_form_url)
-        self.assertTrue('This is a text of the base template' in str(r.content))
-        self.assertTrue('Context hint' in str(r.content))
+        self.assertTrue('This is a text of the base template' in r.content.decode())
+        self.assertTrue('Context hint' in r.content.decode())
 
     def test_15_issue_87_entry_changed_signal(self):
         self.copy_po_file_from_template('./django.po.template')
@@ -338,7 +328,8 @@ class RosettaTestCase(TestCase):
             self.test_old_msgstr = kwargs.get('old_msgstr')
             self.test_new_msgstr = sender.msgstr
             self.test_msg_id = sender.msgid
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
@@ -348,7 +339,7 @@ class RosettaTestCase(TestCase):
         self.assertTrue(self.test_new_msgstr == 'Hello, world')
         self.assertTrue(self.test_msg_id == 'String 2')
 
-        del(self.test_old_msgstr, self.test_new_msgstr, self.test_msg_id)
+        del (self.test_old_msgstr, self.test_new_msgstr, self.test_msg_id)
 
     def test_16_issue_101_post_save_signal(self):
         self.copy_po_file_from_template('./django.po.template')
@@ -358,14 +349,14 @@ class RosettaTestCase(TestCase):
         def test_receiver(sender, **kwargs):
             self.test_sig_lang = kwargs.get('language_code')
 
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
         self.client.post(self.xx_form_url, data)
 
         self.assertTrue(self.test_sig_lang == 'xx')
-        del(self.test_sig_lang)
+        del self.test_sig_lang
 
     def test_17_issue_103_post_save_signal_has_request(self):
         self.copy_po_file_from_template('./django.po.template')
@@ -375,31 +366,32 @@ class RosettaTestCase(TestCase):
         def test_receiver(sender, **kwargs):
             self.test_16_has_request = 'request' in kwargs
 
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
         r = self.client.post(self.xx_form_url, data)
 
         self.assertTrue(self.test_16_has_request)
-        del(self.test_16_has_request)
+        del self.test_16_has_request
 
     def test_18_Test_Issue_gh24(self):
         self.copy_po_file_from_template('./django.po.issue24gh.template')
         r = self.client.get(self.xx_form_url)
 
-        self.assertTrue('m_bb9d8fe6159187b9ea494c1b313d23d4' in str(r.content))
+        self.assertTrue('m_bb9d8fe6159187b9ea494c1b313d23d4' in r.content.decode())
 
         # Post a translation, it should have properly wrapped lines
-        data = {'m_bb9d8fe6159187b9ea494c1b313d23d4':
-                'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean '
-                'commodo ligula eget dolor. Aenean massa. Cum sociis natoque '
-                'penatibus et magnis dis parturient montes, nascetur ridiculus '
-                'mus. Donec quam felis, ultricies nec, pellentesque eu, pretium '
-                'quis, sem. Nulla consequat massa quis enim. Donec pede justo, '
-                'fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, '
-                'rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum '
-                'felis eu pede mollis pretium.'}
+        data = {
+            'm_bb9d8fe6159187b9ea494c1b313d23d4': 'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean '
+            'commodo ligula eget dolor. Aenean massa. Cum sociis natoque '
+            'penatibus et magnis dis parturient montes, nascetur ridiculus '
+            'mus. Donec quam felis, ultricies nec, pellentesque eu, pretium '
+            'quis, sem. Nulla consequat massa quis enim. Donec pede justo, '
+            'fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, '
+            'rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum '
+            'felis eu pede mollis pretium.'
+        }
         r = self.client.post(self.xx_form_url, data)
         with open(self.dest_file, 'r') as po_file:
             pofile_content = po_file.read()
@@ -410,7 +402,7 @@ class RosettaTestCase(TestCase):
         self.copy_po_file_from_template('./django.po.issue24gh.template')
         with self.settings(ROSETTA_POFILE_WRAP_WIDTH=0):
             r = self.client.get(self.xx_form_url)
-            self.assertTrue('m_bb9d8fe6159187b9ea494c1b313d23d4' in str(r.content))
+            self.assertTrue('m_bb9d8fe6159187b9ea494c1b313d23d4' in r.content.decode())
             r = self.client.post(self.xx_form_url, data)
             with open(self.dest_file, 'r') as po_file:
                 pofile_content = po_file.read()
@@ -419,9 +411,9 @@ class RosettaTestCase(TestCase):
     def test_19_Test_Issue_gh34(self):
         self.copy_po_file_from_template('./django.po.issue34gh.template')
         r = self.client.get(self.xx_form_url)
-        self.assertTrue('m_ff7060c1a9aae9c42af4d54ac8551f67_1' in str(r.content))
-        self.assertTrue('m_ff7060c1a9aae9c42af4d54ac8551f67_0' in str(r.content))
-        self.assertTrue('m_09f7e02f1290be211da707a266f153b3' in str(r.content))
+        self.assertTrue('m_ff7060c1a9aae9c42af4d54ac8551f67_1' in r.content.decode())
+        self.assertTrue('m_ff7060c1a9aae9c42af4d54ac8551f67_0' in r.content.decode())
+        self.assertTrue('m_09f7e02f1290be211da707a266f153b3' in r.content.decode())
 
         # post a translation, it should have properly wrapped lines
         data = {
@@ -443,15 +435,16 @@ class RosettaTestCase(TestCase):
     def test_20_Test_Issue_gh38(self):
         # (Have to log in again, since our session engine changed)
         self.client.login(username='test_admin', password='test_password')
-        self.assertTrue('django.contrib.sessions.middleware.SessionMiddleware'
-                        in settings.MIDDLEWARE)
+        self.assertTrue(
+            'django.contrib.sessions.middleware.SessionMiddleware' in settings.MIDDLEWARE
+        )
 
         # Only one backend to test: cache backend
         self.copy_po_file_from_template('./django.po.issue38gh.template')
 
         r = self.client.get(self.xx_form_url)
         self.assertFalse(len(str(self.client.cookies.get('sessionid'))) > 4096)
-        self.assertTrue('m_9efd113f7919952523f06e0d88da9c54' in str(r.content))
+        self.assertTrue('m_9efd113f7919952523f06e0d88da9c54' in r.content.decode())
 
         data = {'m_9efd113f7919952523f06e0d88da9c54': 'Testing cookie length'}
         r = self.client.post(self.xx_form_url, data)
@@ -460,8 +453,8 @@ class RosettaTestCase(TestCase):
         self.assertTrue('Testing cookie length' in pofile_content)
 
         r = self.client.get(self.xx_form_url + '?filter=translated')
-        self.assertTrue('Testing cookie length' in str(r.content))
-        self.assertTrue('m_9f6c442c6d579707440ba9dada0fb373' in str(r.content))
+        self.assertTrue('Testing cookie length' in r.content.decode())
+        self.assertTrue('m_9f6c442c6d579707440ba9dada0fb373' in r.content.decode())
 
     @override_settings(ROSETTA_STORAGE_CLASS='rosetta.storage.CacheRosettaStorage')
     def test_21_concurrency_of_cache_backend(self):
@@ -474,7 +467,7 @@ class RosettaTestCase(TestCase):
         self.client2.get(self.xx_form_url)
         self.assertNotEqual(
             self.client.session.get('rosetta_cache_storage_key_prefix'),
-            self.client2.session.get('rosetta_cache_storage_key_prefix')
+            self.client2.session.get('rosetta_cache_storage_key_prefix'),
         )
 
         # Clean up (restore perms)
@@ -485,12 +478,10 @@ class RosettaTestCase(TestCase):
 
         r = self.client.get(self.xx_form_url)
         # We have distinct hashes, even though the msgid and msgstr are identical
-        self.assertTrue('m_4765f7de94996d3de5975fa797c3451f' in str(r.content))
-        self.assertTrue('m_08e4e11e2243d764fc45a5a4fba5d0f2' in str(r.content))
+        self.assertTrue('m_4765f7de94996d3de5975fa797c3451f' in r.content.decode())
+        self.assertTrue('m_08e4e11e2243d764fc45a5a4fba5d0f2' in r.content.decode())
 
-    @override_settings(ROSETTA_LANGUAGES=(
-        ('xx', 'dummy language'),
-    ))
+    @override_settings(ROSETTA_LANGUAGES=(('xx', 'dummy language'),))
     def test_23_save_header_data(self):
         from django.contrib.auth.models import User
 
@@ -510,10 +501,10 @@ class RosettaTestCase(TestCase):
         r = self.client.get(self.xx_form_url + '?filter=untranslated')
 
         # make sure both strings are untranslated
-        self.assertTrue('dummy language' in str(r.content))
-        self.assertTrue('String 1' in str(r.content))
-        self.assertTrue('String 2' in str(r.content))
-        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in str(r.content))
+        self.assertTrue('dummy language' in r.content.decode())
+        self.assertTrue('String 1' in r.content.decode())
+        self.assertTrue('String 2' in r.content.decode())
+        self.assertTrue('m_e48f149a8b2e8baa81b816c0edf93890' in r.content.decode())
 
         # post a translation
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
@@ -533,10 +524,10 @@ class RosettaTestCase(TestCase):
         # Load the template file
         r = self.client.get(self.xx_form_url)
 
-        self.assertTrue('Progress: 0%' in str(r.content))
+        self.assertTrue('Progress: 0%' in r.content.decode())
         data = {'m_e48f149a8b2e8baa81b816c0edf93890': 'Hello, world'}
         r = self.client.post(self.xx_form_url, data, follow=True)
-        self.assertTrue('Progress: 25%' in str(r.content))
+        self.assertTrue('Progress: 25%' in r.content.decode())
 
     def test_25_replace_access_control(self):
         # Test default access control allows access
@@ -562,17 +553,18 @@ class RosettaTestCase(TestCase):
 
     def test_27_extended_urlconf_language_code_loads_file(self):
         url = reverse(
-            'rosetta-form',
-            kwargs={'po_filter': 'all', 'lang_id': 'fr_FR.utf8', 'idx': 0}
+            'rosetta-form', kwargs={'po_filter': 'all', 'lang_id': 'fr_FR.utf8', 'idx': 0}
         )
         r = self.client.get(url)
-        self.assertTrue('French (France), UTF8' in str(r.content))
-        self.assertTrue('m_03a603523bd75b00414a413657acdeb2' in str(r.content))
+        self.assertTrue('French (France), UTF8' in r.content.decode())
+        self.assertTrue('m_03a603523bd75b00414a413657acdeb2' in r.content.decode())
 
     def test_28_issue_gh87(self):
         """Make sure that rosetta_i18n_catalog_filter is passed into the context."""
         r = self.client.get(self.third_party_file_list_url)
-        self.assertContains(r, '<li class="active"><a href="/rosetta/files/third-party/">')
+        self.assertContains(
+            r, '<li class="active"><a href="/rosetta/files/third-party/">'
+        )
 
     @override_settings(
         SESSION_ENGINE='django.contrib.sessions.backends.signed_cookies',
@@ -580,8 +572,10 @@ class RosettaTestCase(TestCase):
     )
     def test_29_unsupported_p3_django_16_storage(self):
         if VERSION[0:2] < (2, 0):
-            self.assertTrue('django.contrib.sessions.middleware.SessionMiddleware'
-                            in settings.MIDDLEWARE)
+            self.assertTrue(
+                'django.contrib.sessions.middleware.SessionMiddleware'
+                in settings.MIDDLEWARE
+            )
 
             # Force caching to be used by making the pofile read-only
             os.chmod(self.dest_file, 292)  # 0444
@@ -596,8 +590,7 @@ class RosettaTestCase(TestCase):
             os.chmod(self.dest_file, 420)  # 0644
 
     @override_settings(
-        ROSETTA_POFILENAMES=('pr44.po', ),
-        ROSETTA_LANGUAGES=(('xx', 'dummy language'),)
+        ROSETTA_POFILENAMES=('pr44.po',), ROSETTA_LANGUAGES=(('xx', 'dummy language'),)
     )
     def test_30_pofile_names(self):
         os.unlink(self.dest_file)
@@ -605,15 +598,14 @@ class RosettaTestCase(TestCase):
             os.path.join(self.curdir, '../locale/xx/LC_MESSAGES/pr44.po')
         )
         shutil.copy(
-            os.path.normpath(os.path.join(self.curdir, './pr44.po.template')),
-            destfile
+            os.path.normpath(os.path.join(self.curdir, './pr44.po.template')), destfile
         )
 
         r = self.client.get(self.third_party_file_list_url)
-        self.assertTrue('xx/LC_MESSAGES/pr44.po' in str(r.content))
+        self.assertTrue('xx/LC_MESSAGES/pr44.po' in r.content.decode())
 
         r = self.client.get(self.xx_form_url)
-        self.assertTrue('dummy language' in str(r.content))
+        self.assertTrue('dummy language' in r.content.decode())
 
         # (Clean up)
         os.unlink(destfile)
@@ -654,32 +646,35 @@ class RosettaTestCase(TestCase):
             self.assertContains(r, 'rosetta/locale/xx/LC_MESSAGES/django.po')
 
     @override_settings(
-        ROSETTA_ENABLE_REFLANG=True,
-        ROSETTA_LANGUAGES=(('xx', 'dummy language'),)
+        ROSETTA_ENABLE_REFLANG=True, ROSETTA_LANGUAGES=(('xx', 'dummy language'),)
     )
     def test_33_reflang(self):
         self.copy_po_file_from_template('./django.po.issue60.template')
         r = self.client.get(self.xx_form_url)
 
         # Verify that there's an option to select a reflang
-        self.assertTrue('<option value="?ref_lang=xx">dummy language</option>' in str(r.content))
+        self.assertTrue(
+            '<option value="?ref_lang=xx">dummy language</option>' in r.content.decode()
+        )
 
         r = self.client.get(self.xx_form_url + '?ref_lang=xx')
         # The translated string in the test PO file ends up in the "Reference" column
-        self.assertTrue('<span class="message">translated-string1</span>' in str(r.content))
+        self.assertTrue(
+            '<span class="message">translated-string1</span>' in r.content.decode()
+        )
 
     def test_show_occurrences(self):
         r = self.client.get(self.xx_form_url)
         # Verify that occurrences in view
-        self.assertTrue('<td class="location">' in str(r.content))
+        self.assertTrue('<td class="location">' in r.content.decode())
         with self.settings(ROSETTA_SHOW_OCCURRENCES=False):
             r = self.client.get(self.xx_form_url)
             # Verify that occurrences not in view
-            self.assertFalse('<td class="location">' in str(r.content))
+            self.assertFalse('<td class="location">' in r.content.decode())
 
     def test_34_issue_113_app_configs(self):
         r = self.client.get(self.all_file_list_url)
-        self.assertTrue('rosetta/files/all/xx/1/">Test_App' in str(r.content))
+        self.assertTrue('rosetta/files/all/xx/1/">Test_App' in r.content.decode())
 
     @override_settings(ROSETTA_STORAGE_CLASS='rosetta.storage.CacheRosettaStorage')
     def test_35_issue_135_display_exception_messages(self):
@@ -733,7 +728,7 @@ class RosettaTestCase(TestCase):
     def test_39_invalid_get_page(self):
         url = self.xx_form_url + '?filter=untranslated'
 
-        r = self.client.get(url)   # Page not specified
+        r = self.client.get(url)  # Page not specified
         self.assertEqual(r.context['page'], 1)
 
         r = self.client.get(url + '&page=')  # No number given
@@ -746,7 +741,6 @@ class RosettaTestCase(TestCase):
         self.assertEqual(r.context['page'], 1)
 
     def test_40_issue_155_auto_compile(self):
-
         def file_hash(file_string):
             if six.PY3:
                 with open(file_string, encoding="latin-1") as file:
@@ -786,32 +780,50 @@ class RosettaTestCase(TestCase):
         # Disable auto-compilation of the MO when the PO is saved
         with self.settings(ROSETTA_AUTO_COMPILE=False):
             # Make a change to the translations
-            po_file_hash_before, mo_file_hash_before = po_file_hash_after, mo_file_hash_after
+            po_file_hash_before, mo_file_hash_before = (
+                po_file_hash_after,
+                mo_file_hash_after,
+            )
             msg_hashes = message_hashes()
             data = {msg_hashes['String 1']: "Translation 3"}
             self.client.post(self.xx_form_url, data)
-            po_file_hash_after, mo_file_hash_after = file_hash(po_file), file_hash(mo_file)
+            po_file_hash_after, mo_file_hash_after = (
+                file_hash(po_file),
+                file_hash(mo_file),
+            )
 
             # Only the PO should have changed, the MO should be unchanged
             self.assertNotEqual(po_file_hash_before, po_file_hash_after)
             self.assertEqual(mo_file_hash_before, mo_file_hash_after)
 
             # Verify that translating another string also leaves the MO unchanged
-            po_file_hash_before, mo_file_hash_before = po_file_hash_after, mo_file_hash_after
+            po_file_hash_before, mo_file_hash_before = (
+                po_file_hash_after,
+                mo_file_hash_after,
+            )
             msg_hashes = message_hashes()
             data = {msg_hashes['String 2']: "Translation 4"}
             self.client.post(self.xx_form_url, data)
-            po_file_hash_after, mo_file_hash_after = file_hash(po_file), file_hash(mo_file)
+            po_file_hash_after, mo_file_hash_after = (
+                file_hash(po_file),
+                file_hash(mo_file),
+            )
 
             self.assertNotEqual(po_file_hash_before, po_file_hash_after)
             self.assertEqual(mo_file_hash_before, mo_file_hash_after)
 
         with self.settings(ROSETTA_AUTO_COMPILE=True):
-            po_file_hash_before, mo_file_hash_before = po_file_hash_after, mo_file_hash_after
+            po_file_hash_before, mo_file_hash_before = (
+                po_file_hash_after,
+                mo_file_hash_after,
+            )
             msg_hashes = message_hashes()
             data = {msg_hashes['String 2']: "Translation 5"}
             self.client.post(self.xx_form_url, data)
-            po_file_hash_after, mo_file_hash_after = file_hash(po_file), file_hash(mo_file)
+            po_file_hash_after, mo_file_hash_after = (
+                file_hash(po_file),
+                file_hash(mo_file),
+            )
 
             self.assertNotEqual(po_file_hash_before, po_file_hash_after)
             self.assertNotEqual(mo_file_hash_before, mo_file_hash_after)
@@ -842,9 +854,7 @@ class RosettaTestCase(TestCase):
         request.user = self.user
         kwargs = {'po_filter': 'third-party', 'lang_id': 'xx', 'idx': 0}
         view = self._setup_view(
-            view=views.TranslationFormView(),
-            request=request,
-            **kwargs
+            view=views.TranslationFormView(), request=request, **kwargs
         )
         self.assertTrue(view.po_file_is_writable)
 
@@ -853,9 +863,7 @@ class RosettaTestCase(TestCase):
         # make the pofile read-only
         os.chmod(self.dest_file, 292)  # 0444
         view = self._setup_view(
-            view=views.TranslationFormView(),
-            request=request,
-            **kwargs
+            view=views.TranslationFormView(), request=request, **kwargs
         )
         self.assertFalse(view.po_file_is_writable)
 
@@ -873,18 +881,16 @@ class RosettaTestCase(TestCase):
         request.user = self.user
         kwargs = {'po_filter': 'third-party', 'lang_id': 'xx', 'idx': 0}
         view = self._setup_view(
-            view=views.TranslationFormView(),
-            request=request,
-            **kwargs
+            view=views.TranslationFormView(), request=request, **kwargs
         )
         self.assertEqual(view.po_file_path, self.dest_file)
 
         # But if the language isn't an option, we get a 404
-        with self.settings(ROSETTA_LANGUAGES=[l for l in settings.LANGUAGES if l[0] != 'xx']):
+        with self.settings(
+            ROSETTA_LANGUAGES=[l for l in settings.LANGUAGES if l[0] != 'xx']
+        ):
             view = self._setup_view(
-                view=views.TranslationFormView(),
-                request=request,
-                **kwargs
+                view=views.TranslationFormView(), request=request, **kwargs
             )
             with self.assertRaises(Http404):
                 view.po_file_path
@@ -975,16 +981,26 @@ class RosettaTestCase(TestCase):
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
 
-    @vcr.use_cassette('fixtures/vcr_cassettes/test_47_azure_ajax_translation.yaml', match_on=['method', 'scheme', 'host', 'port', 'path', 'query', 'raw_body'], record_mode='new_episodes')
+    @vcr.use_cassette(
+        'fixtures/vcr_cassettes/test_47_azure_ajax_translation.yaml',
+        match_on=['method', 'scheme', 'host', 'port', 'path', 'query', 'raw_body'],
+        record_mode='new_episodes',
+    )
     def test_47_azure_ajax_translation(self):
-        r = self.client.get(reverse('rosetta.translate_text') + '?from=en&to=fr&text=hello%20world')
+        r = self.client.get(
+            reverse('rosetta.translate_text') + '?from=en&to=fr&text=hello%20world'
+        )
         self.assertContains(r, '"Salut tout le monde"')
 
     @override_settings(ROSETTA_REQUIRES_AUTH=True)
     def test_48_requires_auth_not_respected_issue_203(self):
         self.client.logout()
         r = self.client.get(self.all_file_list_url)
-        self.assertRedirects(r, '{}?next=/rosetta/files/all/'.format(settings.LOGIN_URL), fetch_redirect_response=False)
+        self.assertRedirects(
+            r,
+            '{}?next=/rosetta/files/all/'.format(settings.LOGIN_URL),
+            fetch_redirect_response=False,
+        )
         self.assertEqual(302, r.status_code)
 
     @override_settings(ROSETTA_REQUIRES_AUTH=False)
@@ -996,22 +1012,26 @@ class RosettaTestCase(TestCase):
     def test_50_custom_login_url(self):
         self.client.logout()
         r = self.client.get(self.all_file_list_url)
-        self.assertRedirects(r, '/custom-url/?next=/rosetta/files/all/', fetch_redirect_response=False)
+        self.assertRedirects(
+            r, '/custom-url/?next=/rosetta/files/all/', fetch_redirect_response=False
+        )
         self.assertEqual(302, r.status_code)
 
     def test_51_rosetta_languages(self):
         self.assertTrue('xx' in dict(settings.LANGUAGES))
         self.assertFalse('yy' in dict(settings.LANGUAGES))
 
-        with self.settings(ROSETTA_LANGUAGES=(('xx', 'foo language'), )):
+        with self.settings(ROSETTA_LANGUAGES=(('xx', 'foo language'),)):
             r = self.client.get(self.project_file_list_url)
-            self.assertTrue('foo language' in str(r.content))
-            self.assertFalse('bar language' in str(r.content))
+            self.assertTrue('foo language' in r.content.decode())
+            self.assertFalse('bar language' in r.content.decode())
 
-        with self.settings(ROSETTA_LANGUAGES=(('xx', 'foo language'), ('yy', 'bar language'), )):
+        with self.settings(
+            ROSETTA_LANGUAGES=(('xx', 'foo language'), ('yy', 'bar language'))
+        ):
             r = self.client.get(self.project_file_list_url)
-            self.assertTrue('foo language' in str(r.content))
-            self.assertTrue('bar language' in str(r.content))
+            self.assertTrue('foo language' in r.content.decode())
+            self.assertTrue('bar language' in r.content.decode())
 
 
 # Stubbed access control function
diff --git a/rosetta/views.py b/rosetta/views.py
index 27ddb6e..c8e6c4b 100644
--- a/rosetta/views.py
+++ b/rosetta/views.py
@@ -6,6 +6,7 @@ import re
 import unicodedata
 import uuid
 import zipfile
+from urllib.parse import urlencode
 
 from django.conf import settings
 from django.contrib import messages
@@ -21,7 +22,7 @@ from django.urls import reverse
 from django.utils.decorators import method_decorator
 from django.utils.encoding import force_bytes
 from django.utils.functional import Promise, cached_property
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.views.decorators.cache import never_cache
 from django.views.generic import TemplateView, View
 
@@ -37,14 +38,6 @@ from .signals import entry_changed, post_save
 from .storage import get_storage
 
 
-try:
-    # Python 3
-    from urllib.parse import urlencode
-except ImportError:
-    # Python 2
-    from urllib import urlencode
-
-
 def get_app_name(path):
     return path.split('/locale')[0].split('/')[-1]
 
@@ -53,12 +46,15 @@ class LoginURL(Promise):
     """
     Tests friendly login URL, url is resolved at runtime.
     """
+
     def __str__(self):
         return rosetta_settings.LOGIN_URL
 
 
 @method_decorator(never_cache, 'dispatch')
-@method_decorator(user_passes_test(lambda user: can_translate(user), LoginURL()), 'dispatch')
+@method_decorator(
+    user_passes_test(lambda user: can_translate(user), LoginURL()), 'dispatch'
+)
 class RosettaBaseMixin(object):
     """A mixin class for Rosetta's class-based views. It provides:
     * security (see class decorators)
@@ -91,6 +87,7 @@ class RosettaFileLevelMixin(RosettaBaseMixin):
     * po_file (pofile object)
     * po_file_is_writable (bool: do we have filesystem write perms to file)
     """
+
     def _request_request(self, key, default=None):
         if key in self.request.GET:
             return self.request.GET.get(key)
@@ -130,11 +127,12 @@ class RosettaFileLevelMixin(RosettaBaseMixin):
         django_apps = self.po_filter in ('all', 'django')
         project_apps = self.po_filter in ('all', 'project')
 
-        po_paths = find_pos(self.language_id,
-                            project_apps=project_apps,
-                            django_apps=django_apps,
-                            third_party_apps=third_party_apps,
-                            )
+        po_paths = find_pos(
+            self.language_id,
+            project_apps=project_apps,
+            django_apps=django_apps,
+            third_party_apps=third_party_apps,
+        )
         po_paths.sort(key=get_app_name)
 
         try:
@@ -154,17 +152,18 @@ class RosettaFileLevelMixin(RosettaBaseMixin):
             # If we can write changes to file, then we pull it up fresh with
             # each request.
             # XXX: brittle; what if this path doesn't exist? Isn't a .po file?
-            po_file = pofile(self.po_file_path,
-                             wrapwidth=rosetta_settings.POFILE_WRAP_WIDTH)
+            po_file = pofile(
+                self.po_file_path, wrapwidth=rosetta_settings.POFILE_WRAP_WIDTH
+            )
             for entry in po_file:
                 # Entry is an object representing a single entry in the catalog.
                 # We iterate through the *entire catalog*, pasting a hashed
                 # value of the meat of each entry on its side in an attribute
                 # called "md5hash".
                 str_to_hash = (
-                    six.text_type(entry.msgid) +
-                    six.text_type(entry.msgstr) +
-                    six.text_type(entry.msgctxt or '')
+                    six.text_type(entry.msgid)
+                    + six.text_type(entry.msgstr)
+                    + six.text_type(entry.msgctxt or '')
                 ).encode('utf8')
                 entry.md5hash = hashlib.md5(str_to_hash).hexdigest()
         else:
@@ -178,9 +177,9 @@ class RosettaFileLevelMixin(RosettaBaseMixin):
                     # a hashed value of the meat of each entry on its side in
                     # an attribute called "md5hash".
                     str_to_hash = (
-                        six.text_type(entry.msgid) +
-                        six.text_type(entry.msgstr) +
-                        six.text_type(entry.msgctxt or '')
+                        six.text_type(entry.msgid)
+                        + six.text_type(entry.msgstr)
+                        + six.text_type(entry.msgctxt or '')
                     ).encode('utf8')
                     entry.md5hash = hashlib.new('md5', str_to_hash).hexdigest()
                 storage.set(self.po_file_cache_key, po_file)
@@ -206,6 +205,7 @@ class TranslationFileListView(RosettaBaseMixin, TemplateView):
     """Lists the languages, the gettext catalog files that can be translated,
     and their translation progress for a filtered list of apps/projects.
     """
+
     http_method_names = ['get']
     template_name = 'rosetta/file-list.html'
 
@@ -222,12 +222,15 @@ class TranslationFileListView(RosettaBaseMixin, TemplateView):
             if not can_translate_language(self.request.user, language[0]):
                 continue
 
-            po_paths = find_pos(language[0],
-                                project_apps=project_apps,
-                                django_apps=django_apps,
-                                third_party_apps=third_party_apps,
-                                )
-            po_files = [(get_app_name(l), os.path.realpath(l), pofile(l)) for l in po_paths]
+            po_paths = find_pos(
+                language[0],
+                project_apps=project_apps,
+                django_apps=django_apps,
+                third_party_apps=third_party_apps,
+            )
+            po_files = [
+                (get_app_name(l), os.path.realpath(l), pofile(l)) for l in po_paths
+            ]
             po_files.sort(key=lambda app: app[0])
             languages.append((language[0], _(language[1]), po_files))
             has_pos = has_pos or bool(po_paths)
@@ -255,6 +258,7 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
       searched include: source, translated text, "occurence" file path, or
       context hints.
     """
+
     # Note: due to the unorthodox nature of the form itself, we're not using
     # Django's generic FormView as our base class.
     http_method_names = ['get', 'post']
@@ -345,32 +349,38 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
                     file_change = True
 
                     if old_msgstr != new_msgstr or old_fuzzy != is_fuzzy:
-                        entry_changed.send(sender=entry,
-                                           user=request.user,
-                                           old_msgstr=old_msgstr,
-                                           old_fuzzy=old_fuzzy,
-                                           pofile=self.po_file_path,
-                                           language_code=self.language_id,
-                                           )
+                        entry_changed.send(
+                            sender=entry,
+                            user=request.user,
+                            old_msgstr=old_msgstr,
+                            old_fuzzy=old_fuzzy,
+                            pofile=self.po_file_path,
+                            language_code=self.language_id,
+                        )
                 else:
                     messages.error(
                         self.request,
-                        _("Some items in your last translation block couldn't "
-                          "be saved: this usually happens when the catalog file "
-                          "changes on disk after you last loaded it."),
+                        _(
+                            "Some items in your last translation block couldn't "
+                            "be saved: this usually happens when the catalog file "
+                            "changes on disk after you last loaded it."
+                        ),
                     )
 
         if file_change and self.po_file_is_writable:
             try:
                 self.po_file.metadata['Last-Translator'] = unicodedata.normalize(
-                    'NFKD', u"%s %s <%s>" % (
+                    'NFKD',
+                    u"%s %s <%s>"
+                    % (
                         getattr(self.request.user, 'first_name', 'Anonymous'),
                         getattr(self.request.user, 'last_name', 'User'),
-                        getattr(self.request.user, 'email', 'anonymous@user.tld')
-                    )
+                        getattr(self.request.user, 'email', 'anonymous@user.tld'),
+                    ),
                 ).encode('ascii', 'ignore')
                 self.po_file.metadata['X-Translated-Using'] = u"django-rosetta %s" % (
-                    get_rosetta_version())
+                    get_rosetta_version()
+                )
                 self.po_file.metadata['PO-Revision-Date'] = timestamp_with_timezone()
             except UnicodeDecodeError:
                 pass
@@ -382,16 +392,16 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
                 if rosetta_settings.AUTO_COMPILE:
                     self.po_file.save_as_mofile(po_filepath + '.mo')
 
-                post_save.send(sender=None, language_code=self.language_id,
-                               request=self.request
-                               )
+                post_save.send(
+                    sender=None, language_code=self.language_id, request=self.request
+                )
                 # Try auto-reloading via the WSGI daemon mode reload mechanism
                 should_try_wsgi_reload = (
-                    rosetta_settings.WSGI_AUTO_RELOAD and
-                    'mod_wsgi.process_group' in self.request.environ and
-                    self.request.environ.get('mod_wsgi.process_group', None) and
-                    'SCRIPT_FILENAME' in self.request.environ and
-                    int(self.request.environ.get('mod_wsgi.script_reloading', 0))
+                    rosetta_settings.WSGI_AUTO_RELOAD
+                    and 'mod_wsgi.process_group' in self.request.environ
+                    and self.request.environ.get('mod_wsgi.process_group', None)
+                    and 'SCRIPT_FILENAME' in self.request.environ
+                    and int(self.request.environ.get('mod_wsgi.script_reloading', 0))
                 )
                 if should_try_wsgi_reload:
                     try:
@@ -402,6 +412,7 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
                 if rosetta_settings.UWSGI_AUTO_RELOAD:
                     try:
                         import uwsgi
+
                         uwsgi.reload()  # pretty easy right?
                     except:
                         pass  # we may not be running under uwsgi :P
@@ -433,10 +444,12 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
         }
         # Winnow down the query string args to non-blank ones
         query_string_args = {k: v for k, v in query_string_args.items() if v}
-        return HttpResponseRedirect("{url}?{qs}".format(
-            url=reverse('rosetta-form', kwargs=self.kwargs),
-            qs=urlencode_safe(query_string_args)
-        ))
+        return HttpResponseRedirect(
+            "{url}?{qs}".format(
+                url=reverse('rosetta-form', kwargs=self.kwargs),
+                qs=urlencode_safe(query_string_args),
+            )
+        )
 
     def get_context_data(self, **kwargs):
         context = super(TranslationFormView, self).get_context_data(**kwargs)
@@ -491,8 +504,7 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
                     break
         if main_language:
             main_lang_po_path = self.po_file_path.replace(
-                '/%s/' % self.language_id,
-                '/%s/' % main_language_id,
+                '/%s/' % self.language_id, '/%s/' % main_language_id
             )
             # XXX: brittle; what if this path doesn't exist? Isn't a .po file?
             main_lang_po = pofile(main_lang_po_path)
@@ -521,29 +533,31 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
             {k: v for k, v in query_string_args.items() if k == 'ref_lang'}
         )
 
-        context.update({
-            'version': get_rosetta_version(),
-            'LANGUAGES': LANGUAGES,
-            'rosetta_settings': rosetta_settings,
-            'rosetta_i18n_lang_name': rosetta_i18n_lang_name,
-            'rosetta_i18n_lang_code': self.language_id,
-            'rosetta_i18n_lang_code_normalized': self.language_id.replace('_', '-'),
-            'rosetta_i18n_lang_bidi': rosetta_i18n_lang_bidi,
-            'rosetta_i18n_filter': self.msg_filter,
-            'rosetta_i18n_write': self.po_file_is_writable,
-            'rosetta_messages': rosetta_messages,
-            'page_range': needs_pagination and page_range,
-            'needs_pagination': needs_pagination,
-            'main_language': main_language,
-            'rosetta_i18n_app': get_app_name(self.po_file_path),
-            'page': page,
-            'query': self.query,
-            'pagination_query_string_base': pagination_query_string_base,
-            'filter_query_string_base': filter_query_string_base,
-            'paginator': paginator,
-            'rosetta_i18n_pofile': self.po_file,
-            'ref_lang': self.ref_lang,
-        })
+        context.update(
+            {
+                'version': get_rosetta_version(),
+                'LANGUAGES': LANGUAGES,
+                'rosetta_settings': rosetta_settings,
+                'rosetta_i18n_lang_name': rosetta_i18n_lang_name,
+                'rosetta_i18n_lang_code': self.language_id,
+                'rosetta_i18n_lang_code_normalized': self.language_id.replace('_', '-'),
+                'rosetta_i18n_lang_bidi': rosetta_i18n_lang_bidi,
+                'rosetta_i18n_filter': self.msg_filter,
+                'rosetta_i18n_write': self.po_file_is_writable,
+                'rosetta_messages': rosetta_messages,
+                'page_range': needs_pagination and page_range,
+                'needs_pagination': needs_pagination,
+                'main_language': main_language,
+                'rosetta_i18n_app': get_app_name(self.po_file_path),
+                'page': page,
+                'query': self.query,
+                'pagination_query_string_base': pagination_query_string_base,
+                'filter_query_string_base': filter_query_string_base,
+                'paginator': paginator,
+                'rosetta_i18n_pofile': self.po_file,
+                'ref_lang': self.ref_lang,
+            }
+        )
 
         return context
 
@@ -569,11 +583,10 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
         ref_pofile = None
         if rosetta_settings.ENABLE_REFLANG and self.ref_lang != 'msgid':
             replacement = '{separator}locale{separator}{ref_lang}'.format(
-                separator=os.sep,
-                ref_lang=self.ref_lang
+                separator=os.sep, ref_lang=self.ref_lang
             )
             pattern = r'\{separator}locale\{separator}[a-z]{{2}}'.format(separator=os.sep)
-            ref_fn = re.sub(pattern, replacement, self.po_file_path,)
+            ref_fn = re.sub(pattern, replacement, self.po_file_path)
             try:
                 ref_pofile = pofile(ref_fn)
             except IOError:
@@ -616,17 +629,21 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
             rx = re.compile(re.escape(self.query), re.IGNORECASE)
 
             def concat_entry(e):
-                return (six.text_type(e.msgstr) +
-                        six.text_type(e.msgid) +
-                        six.text_type(e.msgctxt) +
-                        six.text_type(e.comment) +
-                        u''.join([o[0] for o in e.occurrences]) +
-                        six.text_type(e.msgid_plural) +
-                        u''.join(e.msgstr_plural.values())
-                        )
+                return (
+                    six.text_type(e.msgstr)
+                    + six.text_type(e.msgid)
+                    + six.text_type(e.msgctxt)
+                    + six.text_type(e.comment)
+                    + u''.join([o[0] for o in e.occurrences])
+                    + six.text_type(e.msgid_plural)
+                    + u''.join(e.msgstr_plural.values())
+                )
 
-            entries = [e_ for e_ in self.po_file
-                       if not e_.obsolete and rx.search(concat_entry(e_))]
+            entries = [
+                e_
+                for e_ in self.po_file
+                if not e_.obsolete and rx.search(concat_entry(e_))
+            ]
         else:
             # Scenario #2: filtered list of messages
             if self.msg_filter == 'untranslated':
@@ -634,8 +651,7 @@ class TranslationFormView(RosettaFileLevelMixin, TemplateView):
             elif self.msg_filter == 'translated':
                 entries = self.po_file.translated_entries()
             elif self.msg_filter == 'fuzzy':
-                entries = [e_ for e_ in self.po_file.fuzzy_entries()
-                           if not e_.obsolete]
+                entries = [e_ for e_ in self.po_file.fuzzy_entries() if not e_.obsolete]
             else:
                 # ("all")
                 entries = [e_ for e_ in self.po_file if not e_.obsolete]
@@ -647,6 +663,7 @@ class TranslationFileDownload(RosettaFileLevelMixin, View):
     and compiled (.mo) files, either as they exist on disk, or, if what's on
     disk is unwritable (permissions-wise), return what's in the cache.
     """
+
     http_method_names = [u'get']
 
     def get(self, request, *args, **kwargs):
@@ -677,7 +694,6 @@ class TranslationFileDownload(RosettaFileLevelMixin, View):
 
 @user_passes_test(lambda user: can_translate(user), LoginURL())
 def translate_text(request):
-
     def translate(text, from_language, to_language, subscription_key):
         """
         This method does the heavy lifting of connecting to the translator API and fetching a response
@@ -696,20 +712,20 @@ def translate_text(request):
         headers = {
             'Ocp-Apim-Subscription-Key': subscription_key,
             'Content-type': 'application/json',
-            'X-ClientTraceId': str(uuid.uuid4())
+            'X-ClientTraceId': str(uuid.uuid4()),
         }
 
-        url_parameters = {
-            "from": from_language,
-            "to": to_language
-        }
+        url_parameters = {"from": from_language, "to": to_language}
 
-        request_data = [
-            {"text": text}
-        ]
+        request_data = [{"text": text}]
 
         api_hostname = AZURE_TRANSLATOR_HOST + AZURE_TRANSLATOR_PATH
-        r = requests.post(api_hostname, headers=headers, params=url_parameters, data=json.dumps(request_data))
+        r = requests.post(
+            api_hostname,
+            headers=headers,
+            params=url_parameters,
+            data=json.dumps(request_data),
+        )
         return json.loads(r.text)
 
     language_from = request.GET.get('from', None)
@@ -723,7 +739,9 @@ def translate_text(request):
         AZURE_CLIENT_SECRET = getattr(settings, 'AZURE_CLIENT_SECRET', None)
 
         try:
-            api_response = translate(text, language_from, language_to, AZURE_CLIENT_SECRET)
+            api_response = translate(
+                text, language_from, language_to, AZURE_CLIENT_SECRET
+            )
 
             # result will be a dict if there is an error, e.g.
             # {
@@ -737,7 +755,9 @@ def translate_text(request):
                 error_message = api_error.get("message")
                 data = {
                     'success': False,
-                    'error': "Microsoft Translation API error: Error code {}, {}".format(error_code, error_message),
+                    'error': "Microsoft Translation API error: Error code {}, {}".format(
+                        error_code, error_message
+                    ),
                 }
             else:
                 # response body will be of the form:
@@ -753,15 +773,14 @@ def translate_text(request):
 
                 translations = api_response[0].get("translations")
                 translated_text = translations[0].get("text")
-                data = {
-                    'success': True,
-                    'translation': translated_text
-                }
+                data = {'success': True, 'translation': translated_text}
         # catch general connection exception in the requests framework
         except requests.exceptions.RequestException as err:
             data = {
                 'success': False,
-                'error': "Error connecting to Microsoft Translation Service: {0}".format(err),
+                'error': "Error connecting to Microsoft Translation Service: {0}".format(
+                    err
+                ),
             }
 
     return JsonResponse(data)
diff --git a/setup.py b/setup.py
index 80e6360..8185914 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,8 @@
-from setuptools import setup, find_packages
-from setuptools.command.test import test as test_command
 import sys
 
+from setuptools import find_packages, setup
+from setuptools.command.test import test as test_command
+
 
 class Tox(test_command):
     user_options = [('tox-args=', 'a', "Arguments to pass to tox")]
@@ -19,12 +20,14 @@ class Tox(test_command):
         # import here, cause outside the eggs aren't loaded
         import tox
         import shlex
+
         args = self.tox_args
         if args:
             args = shlex.split(self.tox_args)
         errno = tox.cmdline(args=args)
         sys.exit(errno)
 
+
 with open('README.rst') as readme:
     long_description = readme.read()
 
@@ -57,9 +60,9 @@ setup(
     zip_safe=False,
     install_requires=[
         'six >=1.2.0',
-        'Django >= 1.11',
+        'Django >= 2.0',
         'requests >= 2.1.0',
-        'polib >= 1.1.0'
+        'polib >= 1.1.0',
     ],
     tests_require=['tox', 'vcrpy'],
     cmdclass={'test': Tox},
diff --git a/testproject/settings.py b/testproject/settings.py
index 694b66d..b33d1a4 100644
--- a/testproject/settings.py
+++ b/testproject/settings.py
@@ -1,9 +1,8 @@
-# -*- coding: utf-8 -*-
-# from __future__ import unicode_literals
-import django
 import os
 import sys
 
+import django
+
 
 SITE_ID = 1
 
@@ -15,7 +14,7 @@ DJANGO_VERSION = django.get_version()
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.path.join(PROJECT_PATH, 'rosetta.db')
+        'NAME': os.path.join(PROJECT_PATH, 'rosetta.db'),
     }
 }
 
@@ -23,7 +22,7 @@ CACHES = {
     'default': {
         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
         'LOCATION': '127.0.0.1:11211',
-        'KEY_PREFIX': 'ROSETTA_TEST'
+        'KEY_PREFIX': 'ROSETTA_TEST',
     }
 }
 
@@ -58,7 +57,7 @@ MIDDLEWARE = (
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.messages.middleware.MessageMiddleware'
+    'django.contrib.messages.middleware.MessageMiddleware',
 )
 
 # Note: languages are overridden in the test runner
@@ -75,15 +74,11 @@ LANGUAGES = (
 SILENCED_SYSTEM_CHECKS = ["translation.E002"]
 
 
-LOCALE_PATHS = [
-    os.path.join(PROJECT_PATH, 'locale'),
-]
+LOCALE_PATHS = [os.path.join(PROJECT_PATH, 'locale')]
 
 SOUTH_TESTS_MIGRATE = False
 
-FIXTURE_DIRS = (
-    os.path.join(PROJECT_PATH, 'fixtures'),
-)
+FIXTURE_DIRS = (os.path.join(PROJECT_PATH, 'fixtures'),)
 STATIC_URL = '/static/'
 ROOT_URLCONF = 'testproject.urls'
 
@@ -102,10 +97,10 @@ TEMPLATES = [
                 "django.template.context_processors.media",
                 "django.template.context_processors.static",
                 "django.template.context_processors.tz",
-                "django.contrib.messages.context_processors.messages"
-            )
-        }
-    },
+                "django.contrib.messages.context_processors.messages",
+            ),
+        },
+    }
 ]
 
 STATIC_URL = '/static/'
diff --git a/tox.ini b/tox.ini
index e635ce1..328ad16 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,6 @@
 [tox]
 envlist =
         flake8,
-        py{27,36}-django111,
         py{36,37}-django{20,21},
         py{36,37,38}-django{22,30},
         gettext,
@@ -19,16 +18,13 @@ setenv =
         PYTHONDONTWRITEBYTECODE=1
 
 deps =
-        django111: Django==1.11.*
         django20: Django==2.0.*
         django21: Django>=2.1a1,<=2.1.99
         django22: Django>=2.2.8,<=2.2.99
         django30: Django>=3.0,<=3.0.99
 
-        py27-django111: python-memcached
-        py{36,37,38}-django{111,20,21,22,30}: python3-memcached
+        py{36,37,38}-django{20,21,22,30}: python3-memcached
 
-        # py27-django111: pudb
         requests
         polib>=1.1.0
         six
@@ -62,9 +58,9 @@ changedir = docs
 commands=
         sphinx-build -W -b html . _build/html
 
+
 [testenv:flake8]
 basepython = python3
 deps = flake8==2.4.1
 commands=
     flake8 {toxinidir}/rosetta
-