diff --git a/aleksis/core/mixins.py b/aleksis/core/mixins.py
index 6da2f056475c418019fd5b312fed9e37dda6d401..5324b5e633460ca8dc73eb9788af1daf7f65fb94 100644
--- a/aleksis/core/mixins.py
+++ b/aleksis/core/mixins.py
@@ -17,7 +17,7 @@ from rules.contrib.admin import ObjectPermissionsModelAdmin
 
 
 @reversion.register()
-class ExtensibleModel():
+class ExtensibleModel:
     """Base model for all objects in AlekSIS apps.
 
     This base model ensures all objects in AlekSIS apps fulfill the
diff --git a/aleksis/core/tables.py b/aleksis/core/tables.py
index 74566fc4b2832bcd55c6a85f2537cc91e027dba1..7bc4e4e14741d7b5bc0f6c878749511a52e95252 100644
--- a/aleksis/core/tables.py
+++ b/aleksis/core/tables.py
@@ -3,7 +3,7 @@ from django_tables2.utils import A
 
 
 class PersonsTable(tables.Table):
-    """Table to list persons"""
+    """Table to list persons."""
 
     class Meta:
         attrs = {"class": "table table-striped table-bordered table-hover table-responsive-xl"}
@@ -13,7 +13,7 @@ class PersonsTable(tables.Table):
 
 
 class GroupsTable(tables.Table):
-    """Table to list groups"""
+    """Table to list groups."""
 
     class Meta:
         attrs = {"class": "table table-striped table-bordered table-hover table-responsive-xl"}