relationship is not working - Laravel / phpunit / Sqlite - php

Question

I am coding a test, but I get some unexpected results in basic relationships. I use in memory sqlite db.
Those test were working well with MySQL db. I guess it has something to do with this migration.
$tournament0 = factory(Tournament::class)
->create(['user_id' => $this->simpleUser->id]);
$this->simpleUser is created on setUp() method
Now, when $this->simpleUser->tournaments should return $tournament0, but it is empty.
My relationship is working, it is not broken. Also, when testing manually in the browser, it works.
It just fail when using phpunit...
Here is the setUp() Method:
public function setUp()
{
parent::setUp();
$this->simpleUser = factory(User::class)->create(['role_id' => Config::get('constants.ROLE_USER')]);
}
Full method that is failing:
/** #test */
public function dashboard_check_initial_state()
{
Artisan::call('db:seed', ['--class' => 'CountriesSeeder', '--database' => 'sqlite']);
Artisan::call('db:seed', ['--class' => 'TournamentLevelSeeder', '--database' => 'sqlite']);
Artisan::call('db:seed', ['--class' => 'CategorySeeder', '--database' => 'sqlite']);
// Given
$this->logWithUser($this->simpleUser);
// Nothing has been created, default dash
$this->visit('/')
->see(trans('core.create_new_tournament'))
->dontSee(trans('core.congigure_categories'));
// Create 1 tournament
$tournament0 = factory(Tournament::class)->create(['user_id' => $this->simpleUser->id]);
$this->visit('/')
->seeInElement("p.text-muted", trans('core.no_tournament_created_yet'));
// Now configure 2/2 categories
$championship1 = factory(Championship::class)->create(['tournament_id' => $tournament0->id,'category_id'=>1]);
$championship2 = factory(Championship::class)->create(['tournament_id' => $tournament0->id,'category_id'=>2]);
factory(ChampionshipSettings::class)->create(['championship_id' => $championship1->id]);
factory(ChampionshipSettings::class)->create(['championship_id' => $championship2->id]);
$this->visit('/')
->seeInElement("span.text-muted", trans('core.congigure_categories'));
}
Any idea what can it be?