Over at the Oh Dear! blog, my buddy Mattias described how we use Gitlab CI to test our app.

That's why we're releasing our Gitlab CI pipeline that is optimized for Laravel applications. It contains all the elements you'd expect: building (composer, yarn & webpack), database seeding, PHPUnit & copy/paste (mess) detectors & some basic security auditing of our 3rd party dependencies.

https://ohdear.app/blog/our-gitlab-ci-pipeline-for-laravel-applications