diff --git a/rest_framework-stubs/test.pyi b/rest_framework-stubs/test.pyi
index 62cc38b3d..b5dca1581 100644
--- a/rest_framework-stubs/test.pyi
+++ b/rest_framework-stubs/test.pyi
@@ -74,7 +74,9 @@ class ForceAuthClientHandler(ClientHandler):
 
 class APIClient(APIRequestFactory, DjangoClient):
     def credentials(self, **kwargs: Any): ...
-    def force_authenticate(self, user: AnonymousUser | AbstractBaseUser = ..., token: Token | None = ...) -> None: ...
+    def force_authenticate(
+        self, user: AnonymousUser | AbstractBaseUser | None = ..., token: Token | None = ...
+    ) -> None: ...
     def request(self, **kwargs: Any) -> _MonkeyPatchedResponse: ...  # type: ignore[override]
     def get(self, path: str, data: _GetDataType = ..., follow: bool = ..., **extra: Any) -> _MonkeyPatchedResponse: ...  # type: ignore[override]
     def post(self, path: str, data: Any | None = ..., format: str | None = ..., content_type: str | None = ..., follow: bool = ..., **extra: Any) -> _MonkeyPatchedResponse: ...  # type: ignore[override]