preserve database data between subsequent tests

Hi,

I've a test class with two distinct tests where I need to maintain data between two test inside the db. Everything is configured as sqlite in memory db.

The problem is that after executing the test_create_quotation_from_external_system (see below the example) the db seem reset to an empty state, so the test_create_quotation_if_quotation_alredy_exists don't find any data inside the table.

How can I preserve the data between tests ?

Below an example of my test, without data but only with relevant information:

<?php

namespace Services\QuotationService;

use Mockery as m;
use Tests\TestCase;
use App\Models\Order;

class QuotationOrderServiceTest extends TestCase
{
    use DatabaseMigrations;

   public function setUp(): void
    {
        parent::setUp();
    }

    public function test_create_quotation_from_external_system()
    {
		// some testing stuff that create one single line inside the database
        self::assertEquals(1,
                           Order::count(),
                           'Failed to create quotation request');

    }

  public function test_create_quotation_if_quotation_alredy_exists()
    {
//this test fail here, because the Order Table is always empty
		self::assertEquals(1,
                           Order::count(),
                           'Failed to check quotation creations if quotation already exists.');

		// some testing stuff that reload same data from previous test but don't create the new line because same
        //quotation number already exists.

        // in this case to be sure that everything was correct, i need to check that the db has one single row like
        // the previous test.

        self::assertEquals(1,
                           Order::count(),
                           'Failed to create quotation request');

    }