diff --git a/opentech/apply/activity/apps.py b/opentech/apply/activity/apps.py
index 7e1f04ff8b281bf230a28e05ecab0dfb8b425094..c224ba349ca1d29e09bb686bc0a4950f7902cb53 100644
--- a/opentech/apply/activity/apps.py
+++ b/opentech/apply/activity/apps.py
@@ -5,4 +5,4 @@ class ActivityConfig(AppConfig):
     name = 'opentech.apply.activity'
 
     def ready(self):
-        from . import signals
+        from . import signals  # NOQA
diff --git a/opentech/apply/activity/messaging.py b/opentech/apply/activity/messaging.py
index 0597f0690ce69c53334066086a58921d636635a3..b7170407a224deb5f0042bb30ccd3ff8dc1fa9d1 100644
--- a/opentech/apply/activity/messaging.py
+++ b/opentech/apply/activity/messaging.py
@@ -253,7 +253,7 @@ class EmailAdapter(AdapterBase):
 
     def send_message(self, message, submission, subject, recipient, **kwargs):
         try:
-            emails_sent = send_mail(
+            send_mail(
                 subject,
                 message,
                 submission.page.specific.from_address,
diff --git a/opentech/apply/activity/tasks.py b/opentech/apply/activity/tasks.py
index eebac11d1e1c7de3485bcaecd67586936300addb..73ff71b8343d368b91776ef80fc0b59cdb6a1dd0 100644
--- a/opentech/apply/activity/tasks.py
+++ b/opentech/apply/activity/tasks.py
@@ -1,7 +1,6 @@
 from celery import Celery
 
 from django.conf import settings
-from django.core.mail import send_mail as dj_send_mail
 from django.core.mail import EmailMessage
 
 app = Celery('tasks')
diff --git a/opentech/apply/activity/tests/factories.py b/opentech/apply/activity/tests/factories.py
index c1b6c22ef86e5f4ac96346a95dbb1be88107cc74..30c09ab31a5971a7300269b9af699093afeca13d 100644
--- a/opentech/apply/activity/tests/factories.py
+++ b/opentech/apply/activity/tests/factories.py
@@ -41,4 +41,4 @@ class MessageFactory(factory.DjangoModelFactory):
     content = factory.Faker('sentence')
     recipient = factory.Faker('email')
     event = factory.SubFactory(EventFactory)
-    external_id = factory.LazyFunction(lambda : '<{}>'.format(uuid.uuid4()))
+    external_id = factory.LazyFunction(lambda: '<{}>'.format(uuid.uuid4()))