Laravel returning 401 instead of redirecting to login

After upgrading to Laravel v13.4.0 my test suite broke - simple tests that ensured that unauthenticated users would be redirected to the login path were instead returning a HTTP 401 response.

public function test_does_not_display_search_for_guest(): void
{
    $this->get('/blog/search?q=title')
        ->assertRedirect('/login');
}

44) Tests\Feature\Posts\SearchesTest::test_does_not_display_search_for_guest
Expected response status code [201, 301, 302, 303, 307, 308] but received 401.
Failed asserting that false is true.

/Users/dwight/Sites/secret-project/vendor/laravel/framework/src/Illuminate/Testing/TestResponseAssert.php:45
/Users/dwight/Sites/secret-project/vendor/laravel/framework/src/Illuminate/Testing/TestResponse.php:201
/Users/dwight/Sites/secret-project/tests/Feature/Posts/SearchesTest.php:30

I discovered the specific change was this PR which adjusts how redirectGuestsTo works. However I don’t use redirectGuestsTo in my project so it was an unexpected failure. I did use redirectUsersTo however:

return Application::configure(basePath: dirname(__DIR__))
    ->withMiddleware(function (Middleware $middleware) {
    
        $middleware->redirectUsersTo(fn () => route('dashboards.show'));
        
    });

It seemed the new change affected using redirectUsersTo in isolation, so the simplest fix is to also add redirectGuestsTo:

return Application::configure(basePath: dirname(__DIR__))
    ->withMiddleware(function (Middleware $middleware) {
    
        $middleware->redirectUsersTo(fn () => route('dashboards.show'));
        $middleware->redirectGuestsTo(fn () => route('login'));
        
    });

Alternatively, you can use the simple syntax of redirectTo:

return Application::configure(basePath: dirname(__DIR__))
    ->withMiddleware(function (Middleware $middleware) {
        
        $middleware->redirectTo(
            guests: fn () => route('login'),
            users: fn () => route('dashboards.show'),
        );
       
    });