How to migrate in memory database once before all tests run

I'm using I'm wanting to migrate the database once, and then in every test class use the DatabaseTransactions trait.

I have a custom command that I call to migrate the database, which I currently have in the setUp method of my applications tests/TestCase class.

I don't want to migrate the database before every test, I want to use transactions. However, I'm not sure how to run the migration once before the entire test suite runs.

The closest thing I could come up with is the setUpBeforeClass static method that will run once before the first test runs.

public static function setUpBeforeClass()
{
    $app = require __DIR__.'/../bootstrap/app.php';

     $app->make(Kernel::class)->bootstrap();

     $app[Kernel::class]->call('migrate-custom');
}

but when I do that, the database is non-existent when the tests run.

Any ideas?

via Chebli Mohamed