diff --git a/machines/models.py b/machines/models.py
index f82610f6..0835f38e 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -1361,8 +1361,10 @@ class Interface(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
             if not (user_request.has_perm("machines.delete_interface") and can_user):
                 return (
                     False,
-                    _("You don't have the right to delete interfaces of another"
-                      " user."),
+                    _(
+                        "You don't have the right to delete interfaces of another"
+                        " user."
+                    ),
                     ("machines.delete_interface",) + (permissions or ()),
                 )
         return True, None, None
@@ -1464,7 +1466,9 @@ class Ipv6List(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
             if not (user_request.has_perm("machines.change_ipv6list") and can_user):
                 return (
                     False,
-                    _("You don't have the right to edit ipv6 of a machine of another user."),
+                    _(
+                        "You don't have the right to edit ipv6 of a machine of another user."
+                    ),
                     ("machines.change_ipv6list",),
                 )
         return True, None, None
@@ -1482,7 +1486,9 @@ class Ipv6List(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
             if not (user_request.has_perm("machines.delete_ipv6list") and can_user):
                 return (
                     False,
-                    _("You don't have the right to delete ipv6 of a machine of another user."),
+                    _(
+                        "You don't have the right to delete ipv6 of a machine of another user."
+                    ),
                     ("machines.delete_ipv6list",) + (permissions or ()),
                 )
         return True, None, None
@@ -1499,7 +1505,9 @@ class Ipv6List(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
         ):
             return (
                 False,
-                _("You don't have the right to view ipv6 of machines other than yours."),
+                _(
+                    "You don't have the right to view ipv6 of machines other than yours."
+                ),
                 ("machines.view_ipv6list",),
             )
         return True, None, None