When the fixture class is a Symfony service with normal dependency injection (i.e. constructor arguments), loading them with $I->loadFixtures(AppFixtures::class) leads to this error message:

[ArgumentCountError] Too few arguments to function App\DataFixtures\AppFixtures::__construct(), 0 passed in /.../vendor/codeception/module-doctrine2/src/Codeception/Module/Doctrine2.php on line 731 and exactly 4 expected