diff --git a/colleges/permissions.py b/colleges/permissions.py
index 3ded6a384b3a15141acb4fde6a740f7b41ac4e74..f6631d5188389da9cf77af3af7687b8676825c68 100644
--- a/colleges/permissions.py
+++ b/colleges/permissions.py
@@ -9,7 +9,7 @@ from django.core.exceptions import PermissionDenied
 def fellowship_required():
     """Require user to have any Fellowship or Administrational permissions."""
     def test(u):
-        if u.is_authenticated():
+        if u.is_authenticated:
             if hasattr(u, 'contributor') and u.contributor.fellowships.exists():
                 # Fellow
                 return True
@@ -20,7 +20,7 @@ def fellowship_required():
 def fellowship_or_admin_required():
     """Require user to have any Fellowship or Administrational permissions."""
     def test(u):
-        if u.is_authenticated():
+        if u.is_authenticated:
             if hasattr(u, 'contributor') and u.contributor.fellowships.exists():
                 # Fellow
                 return True
diff --git a/notifications/views.py b/notifications/views.py
index a98a37183f284f429ea851bfbe2898c1248c7ca4..7cfdfc817785c3110abdc98b1cc41c0393f59132 100644
--- a/notifications/views.py
+++ b/notifications/views.py
@@ -56,7 +56,7 @@ def mark_toggle(request, slug=None):
 
 def live_unread_notification_count(request):
     """Return JSON of unread messages count."""
-    if not request.user.is_authenticated():
+    if not request.user.is_authenticated:
         data = {'unread_count': 0}
     else:
         data = {'unread_count': request.user.notifications.unread().count()}
@@ -65,7 +65,7 @@ def live_unread_notification_count(request):
 
 def live_notification_list(request):
     """Return JSON of unread count and content of messages."""
-    # if not request.user.is_authenticated():
+    # if not request.user.is_authenticated:
     #     data = {
     #         'unread_count': 0,
     #         'list': []
diff --git a/petitions/forms.py b/petitions/forms.py
index f72c516bd455eb914ac8392ea0f1df6bddb6a58d..94ab04f014705664a115bcd4b6cccb65365ad417 100644
--- a/petitions/forms.py
+++ b/petitions/forms.py
@@ -30,7 +30,7 @@ class SignPetitionForm(forms.ModelForm):
         if self.instance.id:
             return email
 
-        if self.current_user.is_authenticated():
+        if self.current_user.is_authenticated:
             if self.current_user.email != email:
                 self.add_error('email', 'This email address is not associated to your account')
         else:
diff --git a/production/permissions.py b/production/permissions.py
index 95723d4bf79ae044664d678d85555fa5d019e182..456800860c88ee98857de1283def9a8e74acb4e4 100644
--- a/production/permissions.py
+++ b/production/permissions.py
@@ -8,7 +8,7 @@ from django.contrib.auth.decorators import user_passes_test
 def is_production_user():
     """Requires user to be a ProductionUser."""
     def test(u):
-        if u.is_authenticated():
+        if u.is_authenticated:
             if hasattr(u, 'production_user') and u.production_user:
                 return True
         return False
diff --git a/scipost/decorators.py b/scipost/decorators.py
index d45d9bc0532728fc68c11143e961e8bf854687c4..9c83af41dfac53a0ecd74166cb3f5095f13cd37b 100644
--- a/scipost/decorators.py
+++ b/scipost/decorators.py
@@ -19,7 +19,7 @@ def has_contributor(user):
 def is_contributor_user():
     """Decorator checking if user is related to any Contributor."""
     def test(u):
-        if u.is_authenticated():
+        if u.is_authenticated:
             return has_contributor(u)
         return False
     return user_passes_test(test)
diff --git a/scipost/views.py b/scipost/views.py
index 68577519c59f7fa08a56dd642b7c94c54b95ad00..5dfae5e57ea16b2c84f6f5bd3f4d784b21445cb5 100644
--- a/scipost/views.py
+++ b/scipost/views.py
@@ -174,7 +174,7 @@ def register(request):
     sent. After activation the user needs to be vetted by the SciPost
     admin.
     """
-    if request.user.is_authenticated():
+    if request.user.is_authenticated:
         return redirect(reverse('scipost:personal_page'))
 
     form = RegistrationForm(request.POST or None)