Write better Laravel tests

8.php

<?php

class LoanTest extends TestCase{
  
    public function test_can_log_a_loan()
    {
        $user = factory(User::class)->create();
        $wallet = factory(Wallet::class)->create([
            'user_id' => $user->id
        ]);

        $this->passportAs($user)
            ->post('api/loans', [
                'total' => 1000,
                'payoff_at' => Carbon::today()->addYear(),
                'wallet_id' => $wallet->id,
            ])
            ->assertSuccessful()
            ->assertJson([
                'id' => 1,
                'total' => 1000,
                'payoff_at' => Carbon::today()->addYear(),
                'user_id' => $user->id,
            ]);

        /** @var Transaction $transaction */
        // ..
    }  
}