id returning empty from within test

I'm following this episode https://laracasts.com/series/lets-build-a-forum-with-laravel/episodes/6 of Let's Build A Forum with Laravel and TDD series for a project of mine. The test is failing due to the fact that $job->id is returning empty, hence the path ends up being /jobs/ instead of something like /jobs/1. Below is the code I have:

Test

public function an_authenticated_user_can_create_a_job()
{
$this->actingAs(factory(User::class)->create());

        $job = factory(Job::class)->make();

        $this->post('/jobs', $job->toArray());

        $this->get('/jobs/' . $job->id)
            ->assertSee($job->title)
            ->assertSee($job->description);
}

Controller

public function storeRequest $request)
{
        $job = Job::create([
        'user_id' => auth()->id(),
            'title' => $request->title,
                'description' => $request->description,
    ]);

        return redirect('/jobs/' . $job->id);
}

Can't point out what went wrong.