Seed once several tables for phpunit I testing with Laravel 5.4

I'm coding functional tests with sqlite in memory for faster results.

Everything seems ok, but I have several tables that needs to be filled so the tests works. They are small tables, and almost never change, so I would like to seed them once on the beginning of the phpunit command only.

Is it posible???

The only thing I fought is adding: Artisan::call('db:seed'); to createApplication() but this will seed once for every tests, and I don't need it..

Any Idea how should I do it?