diff --git a/fastapi_users/authentication/__init__.py b/fastapi_users/authentication/__init__.py
index 0e5298a9..51b938e4 100644
--- a/fastapi_users/authentication/__init__.py
+++ b/fastapi_users/authentication/__init__.py
@@ -152,11 +152,10 @@ class Authenticator:
             if active and not user.is_active:
                 status_code = status.HTTP_401_UNAUTHORIZED
                 user = None
-            elif verified and not user.is_verified:
+            elif (
+                verified and not user.is_verified or superuser and not user.is_superuser
+            ):
                 user = None
-            elif superuser and not user.is_superuser:
-                user = None
-
         if not user and not optional:
             raise HTTPException(status_code=status_code)
         return user
diff --git a/fastapi_users/manager.py b/fastapi_users/manager.py
index 1ce00409..d861c507 100644
--- a/fastapi_users/manager.py
+++ b/fastapi_users/manager.py
@@ -307,7 +307,10 @@ class BaseUserManager(Generic[models.UC, models.UD]):
         if not user.is_active:
             raise UserInactive()
 
-        token_data = {"user_id": str(user.id), "aud": self.reset_password_token_audience}
+        token_data = {
+            "user_id": str(user.id),
+            "aud": self.reset_password_token_audience,
+        }
         token = generate_jwt(
             token_data,
             self.reset_password_token_secret,
@@ -535,8 +538,7 @@ class BaseUserManager(Generic[models.UC, models.UD]):
         return user
 
     async def _update(self, user: models.UD, update_dict: Dict[str, Any]) -> models.UD:
-        for field in update_dict:
-            value = update_dict[field]
+        for field, value in update_dict.items():
             if field == "email" and value != user.email:
                 try:
                     await self.get_by_email(value)
diff --git a/fastapi_users/router/oauth.py b/fastapi_users/router/oauth.py
index 38b7fa39..ce27bdeb 100644
--- a/fastapi_users/router/oauth.py
+++ b/fastapi_users/router/oauth.py
@@ -50,11 +50,10 @@ def get_oauth_router(
         scopes: List[str] = Query(None),
     ):
         # Check that authentication_backend exists
-        backend_exists = False
-        for backend in authenticator.backends:
-            if backend.name == authentication_backend:
-                backend_exists = True
-                break
+        backend_exists = any(
+            backend.name == authentication_backend for backend in authenticator.backends
+        )
+
         if not backend_exists:
             raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST)
 
diff --git a/tests/test_authentication.py b/tests/test_authentication.py
index 30e62f32..d8ddf9e0 100644
--- a/tests/test_authentication.py
+++ b/tests/test_authentication.py
@@ -137,5 +137,5 @@ async def test_authenticator_none_enabled(get_test_auth_client, user):
 @pytest.mark.asyncio
 async def test_authenticators_with_same_name(get_test_auth_client):
     with pytest.raises(DuplicateBackendNamesError):
-        async for client in get_test_auth_client([BackendNone(), BackendNone()]):
+        async for _ in get_test_auth_client([BackendNone(), BackendNone()]):
             pass