Bootstrap laravel 5 in package development

Hi guys, I got stuck during the upgrade to L5 of 1 package. This package run integration tests to a Database (sqlite in memory). With laravel 4 I had successfully bootstrapped the framework and run the tests without problems.

Because now Laravel5 use Kernels i don't understand how to bootstrap it only for development purpose.

I had a previous question about this without have a point to start trying:

https://laracasts.com/discuss/channels/general-discussion/l5-understanding-package-development?page=1#reply-30184

I hope someone can help me out with this :)