Testing - Migrations from different directories

You can use --path to specify one or more paths

php artisan migrate --path database/migrations/onboarding-form
//or
$this->artisan('migrate:refresh', ['--path' => 'database/migrations/onboarding-form']);

Yes, you can explicitly run migrations in the sub directory if you modify the createApplication method, e.g.

// tests/CreatesApplication.php
public function createApplication()
{
    $app = require __DIR__.'/../bootstrap/app.php';

    $app->make(Kernel::class)->bootstrap();
    // add this
    $this->afterApplicationCreated(function () {
        $this->artisan(‘migrate’, [‘—path’ => ‘database/migrations/onboarding-form’]);
    });

    return $app;
}