diff --git a/src/backend/InvenTree/InvenTree/sso.py b/src/backend/InvenTree/InvenTree/sso.py
index 9279d5819824..b77e9c136ea6 100644
--- a/src/backend/InvenTree/InvenTree/sso.py
+++ b/src/backend/InvenTree/InvenTree/sso.py
@@ -119,7 +119,7 @@ def ensure_sso_groups(sender, sociallogin: SocialLogin, **kwargs):
     # remove groups not listed by SSO if not disabled
     if get_global_setting('SSO_REMOVE_GROUPS'):
         for group in user.groups.all():
-            if not group.name in group_names:
+            if group.name not in group_names:
                 logger.info(f'Removing group {group.name} from {user}')
                 user.groups.remove(group)
 
diff --git a/src/backend/InvenTree/plugin/base/event/events.py b/src/backend/InvenTree/plugin/base/event/events.py
index c99a7547f7f3..ef1bb152b2e7 100644
--- a/src/backend/InvenTree/plugin/base/event/events.py
+++ b/src/backend/InvenTree/plugin/base/event/events.py
@@ -160,7 +160,7 @@ def allow_table_event(table_name):
         'part_partstocktakereport',
     ]
 
-    return not table_name in ignore_tables
+    return table_name not in ignore_tables
 
 
 @receiver(post_save)
diff --git a/src/backend/InvenTree/stock/models.py b/src/backend/InvenTree/stock/models.py
index f7598e5a1717..254830602903 100644
--- a/src/backend/InvenTree/stock/models.py
+++ b/src/backend/InvenTree/stock/models.py
@@ -1359,7 +1359,7 @@ def can_delete(self):
         if self.installed_item_count() > 0:
             return False
 
-        return not self.sales_order is not None
+        return self.sales_order is None
 
     def get_installed_items(self, cascade: bool = False) -> set[StockItem]:
         """Return all stock items which are *installed* in this one!
@@ -1542,7 +1542,7 @@ def can_adjust_location(self):
         if self.belongs_to is not None:
             return False
 
-        return not self.sales_order is not None
+        return self.sales_order is None
 
     @property
     def tracking_info_count(self):