diff --git a/app/models.py b/app/models.py
index fb530ea3b..b39de532d 100644
--- a/app/models.py
+++ b/app/models.py
@@ -144,6 +144,7 @@ EMAIL_TYPE = 'email'
 WHITELIST_RECIPIENT_TYPE = [MOBILE_TYPE, EMAIL_TYPE]
 whitelist_recipient_types = db.Enum(*WHITELIST_RECIPIENT_TYPE, name='recipient_type')
 
+
 class ServiceWhitelist(db.Model):
     __tablename__ = 'service_whitelist'
 
diff --git a/app/notifications/rest.py b/app/notifications/rest.py
index b5dad7427..269da9bef 100644
--- a/app/notifications/rest.py
+++ b/app/notifications/rest.py
@@ -254,7 +254,8 @@ def send_notification(notification_type):
             notification['to'],
             itertools.chain(
                 itertools.chain.from_iterable([user.mobile_number, user.email_address] for user in service.users),
-                ([member.recipient for member in service.whitelist]) if api_user.key_type == KEY_TYPE_NORMAL else iter([])
+                ([member.recipient for member in service.whitelist])
+                if api_user.key_type == KEY_TYPE_NORMAL else iter([])
             )
         )
     )):
diff --git a/tests/app/notifications/rest/test_send_notification.py b/tests/app/notifications/rest/test_send_notification.py
index f6a0145de..56fcfad33 100644
--- a/tests/app/notifications/rest/test_send_notification.py
+++ b/tests/app/notifications/rest/test_send_notification.py
@@ -1004,12 +1004,11 @@ def test_should_not_persist_notification_or_send_sms_if_simulated_number(
 
 
 @pytest.mark.parametrize('to_sms', ['07827992635'])
-def test_should_not_send_sms_to_non_whitelist_recipient_in_trial_mode_with_live_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_sms,
-    mocker):
+def test_should_not_send_sms_to_non_whitelist_recipient_in_trial_mode_with_live_key(client,
+                                                                                    notify_db,
+                                                                                    notify_db_session,
+                                                                                    to_sms,
+                                                                                    mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_sms_to_provider.apply_async')
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
     service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service)
@@ -1044,13 +1043,13 @@ def test_should_not_send_sms_to_non_whitelist_recipient_in_trial_mode_with_live_
     assert expected_response_message in json_resp['message']['to']
     apply_async.assert_not_called()
 
+
 @pytest.mark.parametrize('to_email', ['non_whitelist_recipient@mail.com'])
-def test_should_not_send_email_to_non_whitelist_recipient_in_trial_mode_with_live_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_email,
-    mocker):
+def test_should_not_send_email_to_non_whitelist_recipient_in_trial_mode_with_live_key(client,
+                                                                                      notify_db,
+                                                                                      notify_db_session,
+                                                                                      to_email,
+                                                                                      mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_email_to_provider.apply_async')
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
     service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service)
@@ -1087,15 +1086,15 @@ def test_should_not_send_email_to_non_whitelist_recipient_in_trial_mode_with_liv
 
 
 @pytest.mark.parametrize('to_sms', ['07827992635'])
-def test_should_not_send_sms_to_whitelist_recipient_in_trial_mode_with_team_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_sms,
-    mocker):
+def test_should_not_send_sms_to_whitelist_recipient_in_trial_mode_with_team_key(client,
+                                                                                notify_db,
+                                                                                notify_db_session,
+                                                                                to_sms,
+                                                                                mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_sms_to_provider.apply_async')
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
-    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service, mobile_number=to_sms)
+    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session,
+                                                        service=service, mobile_number=to_sms)
     sms_template = create_sample_template(notify_db, notify_db_session, service=service)
 
     assert service_whitelist.service_id == service.id
@@ -1124,15 +1123,15 @@ def test_should_not_send_sms_to_whitelist_recipient_in_trial_mode_with_team_key(
 
 
 @pytest.mark.parametrize('to_email', ['non_whitelist_recipient@mail.com'])
-def test_should_not_send_email_to_whitelist_recipient_in_trial_mode_with_team_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_email,
-    mocker):
+def test_should_not_send_email_to_whitelist_recipient_in_trial_mode_with_team_key(client,
+                                                                                  notify_db,
+                                                                                  notify_db_session,
+                                                                                  to_email,
+                                                                                  mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_sms_to_provider.apply_async')
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
-    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service, email_address=to_email)
+    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session,
+                                                        service=service, email_address=to_email)
     email_template = create_sample_email_template(notify_db, notify_db_session, service=service)
 
     assert service_whitelist.service_id == service.id
@@ -1161,16 +1160,16 @@ def test_should_not_send_email_to_whitelist_recipient_in_trial_mode_with_team_ke
 
 
 @pytest.mark.parametrize('to_sms', ['07123123123'])
-def test_should_send_sms_to_whitelist_recipient_in_trial_mode_with_live_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_sms,
-    mocker):
+def test_should_send_sms_to_whitelist_recipient_in_trial_mode_with_live_key(client,
+                                                                            notify_db,
+                                                                            notify_db_session,
+                                                                            to_sms,
+                                                                            mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_sms_to_provider.apply_async')
 
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
-    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service, mobile_number=to_sms)
+    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session,
+                                                        service=service, mobile_number=to_sms)
     sms_template = create_sample_template(notify_db, notify_db_session, service=service)
 
     assert service_whitelist.service_id == service.id
@@ -1200,16 +1199,16 @@ def test_should_send_sms_to_whitelist_recipient_in_trial_mode_with_live_key(
 
 
 @pytest.mark.parametrize('to_email', ['whitelist_recipient@mail.com'])
-def test_should_send_email_to_whitelist_recipient_in_trial_mode_with_live_key(
-    client,
-    notify_db,
-    notify_db_session,
-    to_email,
-    mocker):
+def test_should_send_email_to_whitelist_recipient_in_trial_mode_with_live_key(client,
+                                                                              notify_db,
+                                                                              notify_db_session,
+                                                                              to_email,
+                                                                              mocker):
     apply_async = mocker.patch('app.celery.provider_tasks.send_email_to_provider.apply_async')
 
     service = create_sample_service(notify_db, notify_db_session, limit=2, restricted=True)
-    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session, service=service, email_address=to_email)
+    service_whitelist = create_sample_service_whitelist(notify_db, notify_db_session,
+                                                        service=service, email_address=to_email)
     email_template = create_sample_email_template(notify_db, notify_db_session, service=service)
 
     assert service_whitelist.service_id == service.id
diff --git a/tests/app/service/test_service_whitelist.py b/tests/app/service/test_service_whitelist.py
index 1eba735fa..23f6a3aa2 100644
--- a/tests/app/service/test_service_whitelist.py
+++ b/tests/app/service/test_service_whitelist.py
@@ -20,6 +20,7 @@ def test_get_whitelist_returns_data(client, sample_service_whitelist):
         'phone_numbers': []
     }
 
+
 def test_get_whitelist_separates_emails_and_phones(client, sample_service):
     dao_add_and_commit_whitelisted_contacts([
         ServiceWhitelist.from_string(sample_service.id, EMAIL_TYPE, 'service@example.com'),
@@ -71,6 +72,7 @@ def test_update_whitelist_replaces_old_whitelist(client, sample_service_whitelis
     assert whitelist[0].recipient == '07123456789'
     assert whitelist[1].recipient == 'foo@bar.com'
 
+
 def test_update_whitelist_doesnt_remove_old_whitelist_if_error(client, sample_service_whitelist):
 
     data = {