diff --git a/src/accounting/utils/user.py b/src/accounting/utils/user.py
index f7c20ad..c50d6f6 100644
--- a/src/accounting/utils/user.py
+++ b/src/accounting/utils/user.py
@@ -50,10 +50,11 @@ class AbstractUserUtils(t.Generic[T], ABC):
 
     @property
     @abstractmethod
-    def current_user(self) -> T:
-        """Returns the current user.
+    def current_user(self) -> T | None:
+        """Returns the currently logged-in user.
 
-        :return: The current user.
+        :return: The currently logged-in user, or None if the user has not
+            logged in
         """
 
     @abstractmethod
@@ -117,7 +118,7 @@ def get_user_pk(username: str) -> int:
     return __user_utils.get_pk(__user_utils.get_by_username(username))
 
 
-def get_current_user() -> user_cls:
+def get_current_user() -> user_cls | None:
     """Returns the currently logged-in user.  The result is cached in the
     current request.
 
diff --git a/tests/test_site/__init__.py b/tests/test_site/__init__.py
index 941af29..7455172 100644
--- a/tests/test_site/__init__.py
+++ b/tests/test_site/__init__.py
@@ -80,7 +80,7 @@ def create_app(is_testing: bool = False) -> Flask:
             return auth.User.id
 
         @property
-        def current_user(self) -> auth.User:
+        def current_user(self) -> auth.User | None:
             return auth.current_user()
 
         def get_by_username(self, username: str) -> auth.User | None: