diff --git a/codeforlife/tests/api.py b/codeforlife/tests/api.py
index a99cbae..89c771b 100644
--- a/codeforlife/tests/api.py
+++ b/codeforlife/tests/api.py
@@ -268,6 +268,8 @@ def login_as(self, user: TypedUser, password: str = "password"):
             user: The user to log in as.
             password: The user's password.
         """
+        auth_user = None
+
         if isinstance(user, AdminSchoolTeacherUser):
             auth_user = self.login_admin_school_teacher(user.email, password)
         elif isinstance(user, NonAdminSchoolTeacherUser):
diff --git a/codeforlife/user/models/teacher.py b/codeforlife/user/models/teacher.py
index 0b816a8..3ce2d69 100644
--- a/codeforlife/user/models/teacher.py
+++ b/codeforlife/user/models/teacher.py
@@ -174,6 +174,7 @@ def get_queryset(self):
     objects: models.Manager["NonSchoolTeacher"] = Manager()
 
 
+# pylint: disable-next=invalid-name
 TypedTeacher = t.Union[
     SchoolTeacher,
     AdminSchoolTeacher,
diff --git a/codeforlife/user/models/user.py b/codeforlife/user/models/user.py
index 050d8e5..881d4bb 100644
--- a/codeforlife/user/models/user.py
+++ b/codeforlife/user/models/user.py
@@ -605,6 +605,7 @@ class Meta(TypedModelMeta):
     )
 
 
+# pylint: disable-next=invalid-name
 TypedUser = t.Union[
     TeacherUser,
     SchoolTeacherUser,