laravel test protected Job Arguments with assertPushed

Question

I have a question about testing Jobs in Laravel.

I use Laravel 8, PHP 7.4.13 and PHPUnit 9.5.8.

I have a test class, that tests if a Job is pusehd:

public function a_job_is_pushed_to_queue()
{
  Queue::fake();

  $this->functionWhereTheJobIsCalled();

  Queue::assertPushed(TestJob::class);
}

The TestJob is called with constructor arguments and I want also to test, if the Job is called with the correct arguments. Like you can also do with Mockery.

On Larave documentation I found out, that I can pass a closure to assertPushed to test this like so:

Queue::assertPushed(function(TestJob $job)
{
  return $job->pseudonym === $this->patients[0]->pseudonym;
});

The problem is, that the argument "pseudonym", that is given to TestJob constructor is a protected argument. When I run the test, this error occurs:

Error: Cannot access protected property App\Jobs\TestJob::$pseudonym

JobTest looks like this:

class JobTest implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $pseudonym;

    public function __construct($pseudonym)
    {
        $this->pseudonym = $pseudonym;
    }
}

I wondered if there is any way to test protected Job arguments without converting them to public?