diff --git a/simple_history/tests/tests/test_admin.py b/simple_history/tests/tests/test_admin.py
index 4b707706..c6a847ed 100644
--- a/simple_history/tests/tests/test_admin.py
+++ b/simple_history/tests/tests/test_admin.py
@@ -790,8 +790,7 @@ def test_history_view_sets_admin_user_view(self):
 
         user_model = get_user_model()
         admin_user_view = "admin:{}_{}_change".format(
-            user_model._meta.app_label,
-            user_model._meta.model_name
+            user_model._meta.app_label, user_model._meta.model_name
         )
         context = {
             "title": admin.history_view_title(request, poll),
@@ -833,8 +832,7 @@ def test_history_view_sets_admin_user_view_on_user_model_override(self):
 
         user_model = BucketMember
         admin_user_view = "admin:{}_{}_change".format(
-            user_model._meta.app_label,
-            user_model._meta.model_name
+            user_model._meta.app_label, user_model._meta.model_name
         )
         context = {
             "title": admin.history_view_title(request, bucket_data),
@@ -875,8 +873,7 @@ def test_history_view_sets_admin_user_view_on_custom_user_id_field(self):
 
         user_model = get_user_model()
         admin_user_view = "admin:{}_{}_change".format(
-            user_model._meta.app_label,
-            user_model._meta.model_name
+            user_model._meta.app_label, user_model._meta.model_name
         )
         context = {
             "title": admin.history_view_title(request, instance),
diff --git a/simple_history/tests/tests/test_models.py b/simple_history/tests/tests/test_models.py
index 5d2ad468..fb4f5983 100644
--- a/simple_history/tests/tests/test_models.py
+++ b/simple_history/tests/tests/test_models.py
@@ -600,20 +600,20 @@ def test_model_with_excluded_fields(self):
 
     def test_history_user_model_is_auth_user_as_default(self):
         self.assertEqual(
-            get_user_model(),
-            get_history_model_for_model(Poll)._history_user_model
+            get_user_model(), get_history_model_for_model(Poll)._history_user_model
         )
 
     def test_history_user_model_is_user_model_on_override(self):
         self.assertEqual(
-            BucketMember,
-            get_history_model_for_model(BucketData)._history_user_model
+            BucketMember, get_history_model_for_model(BucketData)._history_user_model
         )
 
     def test_history_user_model_is_user_model_on_override_register(self):
         self.assertEqual(
             BucketMember,
-            get_history_model_for_model(BucketDataRegisterChangedBy)._history_user_model
+            get_history_model_for_model(
+                BucketDataRegisterChangedBy
+            )._history_user_model,
         )
 
     def test_user_model_override(self):
@@ -2313,9 +2313,12 @@ def test_history_user_does_not_exist(self):
     def test_history_user_model_is_auth_user(self):
         self.assertEqual(
             get_user_model(),
-            get_history_model_for_model(ExternalModelWithCustomUserIdField)._history_user_model
+            get_history_model_for_model(
+                ExternalModelWithCustomUserIdField
+            )._history_user_model,
         )
 
+
 class RelatedNameTest(TestCase):
     def setUp(self):
         self.user_one = get_user_model().objects.create(  # nosec