diff --git a/src/wagtail_personalisation/rules.py b/src/wagtail_personalisation/rules.py
index c012cd0..df98ff2 100644
--- a/src/wagtail_personalisation/rules.py
+++ b/src/wagtail_personalisation/rules.py
@@ -6,13 +6,13 @@ from importlib import import_module
 
 from django.apps import apps
 from django.conf import settings
-from django.core.exceptions import ObjectDoesNotExist
 from django.contrib.sessions.models import Session
+from django.core.exceptions import ObjectDoesNotExist
 from django.db import models
 from django.template.defaultfilters import slugify
+from django.test.client import RequestFactory
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
-from django.test.client import RequestFactory
 from modelcluster.fields import ParentalKey
 from user_agents import parse
 from wagtail.admin.edit_handlers import (
diff --git a/tests/settings.py b/tests/settings.py
index 9349f5c..51125a7 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -2,7 +2,6 @@ from __future__ import absolute_import, unicode_literals
 
 import os
 
-
 DATABASES = {
     'default': {
         'ENGINE': os.environ.get('DATABASE_ENGINE', 'django.db.backends.sqlite3'),
diff --git a/tests/site/pages/migrations/0002_regularpage.py b/tests/site/pages/migrations/0002_regularpage.py
index 8e7bbfb..df2697b 100644
--- a/tests/site/pages/migrations/0002_regularpage.py
+++ b/tests/site/pages/migrations/0002_regularpage.py
@@ -2,7 +2,6 @@
 from __future__ import unicode_literals
 
 import django.db.models.deletion
-
 import wagtail.core.fields
 from django.db import migrations, models
 
diff --git a/tests/unit/test_factories.py b/tests/unit/test_factories.py
index 0ce5b7c..d82efba 100644
--- a/tests/unit/test_factories.py
+++ b/tests/unit/test_factories.py
@@ -4,7 +4,7 @@ import datetime
 
 import pytest
 
-from tests.factories.rule import ReferralRuleFactory, QueryRuleFactory
+from tests.factories.rule import QueryRuleFactory, ReferralRuleFactory
 from tests.factories.segment import SegmentFactory
 from wagtail_personalisation.models import Segment
 from wagtail_personalisation.rules import TimeRule
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
index ca1f1d6..9d3c7f8 100644
--- a/tests/unit/test_utils.py
+++ b/tests/unit/test_utils.py
@@ -1,7 +1,7 @@
 import pytest
+
 from tests.factories.page import ContentPageFactory
-from wagtail_personalisation.utils import (
-    impersonate_other_page)
+from wagtail_personalisation.utils import impersonate_other_page
 
 
 @pytest.fixture
diff --git a/tests/unit/test_views.py b/tests/unit/test_views.py
index 79d2afc..44faff7 100644
--- a/tests/unit/test_views.py
+++ b/tests/unit/test_views.py
@@ -1,7 +1,6 @@
 import pytest
-
-from django.contrib.auth.models import Permission
 from django.urls import reverse
+
 from wagtail_personalisation.models import Segment
 from wagtail_personalisation.rules import VisitCountRule