Whole database empty after running php artisan test

I want to write tests for Laravel app (version 11.20.0). I just made a dummy first test which looks like this:

use App\Domain\SplicingPurchaseOrder\Models\SplicingPurchaseOrder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class SplicingPurchaseOrderTransitionTest extends TestCase
{
    use RefreshDatabase;

    public function testInProcessOrderStaysInProcess(): void
    {
        $this->assertEquals(0, SplicingPurchaseOrder::all()->count());
    }
}

When I ran php artisan test --filter testInProcessOrderStaysInProcess

The whole database got emptied, every table in the database. I did similar tests before on another project and there the tests worked as expected: entries created during the test got deleted after tests ran but all the other entries in database were left intact.

What am I missing? How to achieve testing so that only entries created during testing would be deleted?