diff --git a/bookwyrm/models/group.py b/bookwyrm/models/group.py
index 8fab4472..f10cb331 100644
--- a/bookwyrm/models/group.py
+++ b/bookwyrm/models/group.py
@@ -141,7 +141,7 @@ class GroupMemberInvitation(models.Model):
             # let the other members know about it
             for membership in self.group.memberships.all():
                 member = membership.user
-                if member != self.user and member != self.group.user:
+                if member not in (self.user, self.group.user):
                     model.objects.create(
                         user=member,
                         related_user=self.user,
diff --git a/bookwyrm/templates/notifications/items/leave.html b/bookwyrm/templates/notifications/items/leave.html
index e6fe72be..9c7a71b6 100644
--- a/bookwyrm/templates/notifications/items/leave.html
+++ b/bookwyrm/templates/notifications/items/leave.html
@@ -17,4 +17,4 @@
     has left your group "<a href="{{ group_path }}">{{ group_name }}</a>"
     {% endblocktrans %}
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}
diff --git a/bookwyrm/views/user.py b/bookwyrm/views/user.py
index dd30b2b4..bbc2edd4 100644
--- a/bookwyrm/views/user.py
+++ b/bookwyrm/views/user.py
@@ -146,7 +146,7 @@ class Groups(View):
         user = get_user_from_username(request.user, username)
 
         paginated = Paginator(
-          models.Group.memberships.filter(user=user).order_by("-created_date"), PAGE_LENGTH
+            models.Group.memberships.filter(user=user).order_by("-created_date"), PAGE_LENGTH
         )
         data = {
             "user": user,