Faker Invoice Creation not running

Working on a test to create an invoice and check that it has been created

For the test I made tests/Feature/Http/Controllers/DashboardController/DownloadInvoicesTest.php with:

<?php

namespace Tests\Feature\Http\Controllers\DashboardController;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithFaker;
use Tests\TestCase;

class DownloadInvoicesTest extends TestCase
{
    /**
     * Test the downloadInvoices method.
     *
     * @return void
     */
    public function testDownloadInvoices()
    {
        // Create an invoice
        $invoice = \App\Models\Invoice::factory()->create();
        
        // Make a GET request to the route that triggers the downloadInvoices method
        $response = $this->get('/downloadInvoices');

        // Assert that the response status is 200
        $response->assertStatus(200);

        // Assert that the response has headers indicating a file download
        $response->assertHeader('Content-Disposition', 'attachment; filename=invoices.pdf');
    }
}

I also added a factory database/factories/InvoiceFactory.php

<?php

namespace Database\Factories;

use Illuminate\Database\Eloquent\Factories\Factory;

/**
 * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Invoice>
 */
class InvoiceFactory extends Factory
{
    /**
     * Define the model's default state.
     *
     * @return array<string, mixed>
     */
    public function definition()
    {
        return [
            'invoice_no' => $this->faker->unique()->numerify('INV#####'),
            'order_id' => $this->faker->unique()->randomNumber(),
            'order_id' => $this->faker->unique()->randomNumber(),
            'paid_at' => $this->faker->date(),
            'payment_id' => $this->faker->unique()->randomNumber(),
            'status' => 'paid',
            'domain_order_id' => $this->faker->unique()->randomNumber(),
            // Add other fields as necessary...
        ];
    }
}

and I updated the model app/Models/Invoice.php to work with factories:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Invoice extends Model
{
    use HasFactory;

    protected $fillable = [
        'invoice_no', 'order_id', 'user_id', 'paid_at', 'status',
        'payment_id', 'domain_order_id',
    ];

    protected $casts = [
        'paid_at' => 'datetime',
    ];

    public function order()
    {
        return $this->belongsTo(\App\Order::class);
    }

    public function domainOrder()
    {
        return $this->belongsTo(\App\Models\DomainOrder::class, 'domain_order_id');
    }

    /**
     * The "booting" method of the model.
     *
     * @return void
     */
    protected static function boot()
    {
        parent::boot();

        static::created(function ($invoice) {
            $invoice->invoice_no = str_pad($invoice->id, 5, 0, STR_PAD_LEFT).date('dmY');
            $invoice->save();
        });
    }
}

Issue is that verification fails and not data is added to Invoice tabel at mysql_testing database

DB_CONNECTION=mysql_testing
DB_HOST=localhost
DB_DATABASE=app_test
DB_USERNAME=root
DB_PASSWORD=
DB_PORT=3306

in .env.testing

The method to run invoices is

public function downloadInvoices()
    {
        $params = request()->invoices ?: [];
        $path = storage_path().'/invoices/'.Auth::user()->id;
        if (! count($params)) {
            return redirect()->back()->with('exception', 'Please select invoices');
        }

        // Clean old data and create folder
        \File::deleteDirectory($path);
        if (! file_exists($path)) {
            mkdir($path, 0777, true);
        }
        // Init zip file
        $zip = Zip::create($path.'/invoices.zip');
        // Create pdf invoice
        // https://ourcodeworld.com/articles/read/687/how-to-configure-a-header-and-footer-in-dompdf
        $lastId = Order::orderBy('id', 'DESC')->first()->id ?? 0;
        foreach ($params as $param) {
            if ($param) {
                $pathPdf = '';
                $ids = explode('-', $param);
                $orderId = $ids[0];
                $invoiceId = $ids[1];

                $order = Auth::user()->orders()->where('id', $orderId)->first();
                $invoice = Invoice::where('id', $invoiceId)->first();
                $orderDate = $invoice->paid_at;
                $dateOnly = explode(' ', $orderDate);
                unset($dateOnly[1]);
                $dateOnly = implode(' ', $dateOnly);
                $dateOnly = str_replace('-', '', $dateOnly);
                $invoiceNumber = $lastId.$dateOnly;
                // Debug by uncommenting. Will display html in browser instead of download as pdf
                // return view('pdfs.invoice', [
                //     'order' => $order,
                // 'invoice'=>$invoice,
                //     'plan' => $order->plan,
                //     'extraSpace' => $order->extra_space,
                //     'project' => $order->project,
                //     'invoiceNumber' => $invoiceNumber,
                // ]);
                $pdf = \PDF::loadView('pdfs.invoice', [
                    'order' => $order,
                    'invoice'=>$invoice,
                    'plan' => $order->plan,
                    'extraSpace' => $order->extra_space,
                    'project' => $order->project,
                    'invoiceNumber' => $invoiceNumber,
                ]);

                $pathPdf = $path.'/appname-'.Str::slug($order->project->name, '-').'-'.$invoice->id.'-'.date('d-m-Y').'.pdf';
                $pdf->setWarnings(true)->save($pathPdf);
                // Add to zipfile
                $zip->add($pathPdf);
            }
        }

        $zip->close();

        return response()->download($path.'/invoices.zip');
    }

What am I doing wrong running the faker? And what am I doing wrong verifying a created invoice?