PHPUnit vs Pest for Laravel — Two Testing Styles for Code That Doesn't Break in Production

The problem is always the same: your code works locally, but breaks in production because you missed an edge case. And when the client calls because the checkout disappears, you remember that time spent writing tests is never wasted.

We, at Meteora Web, see this every day. We inherited projects with zero tests and spent nights debugging. From that experience we learned: tests are not optional; they are the difference between a safe release and an incident. In this article we compare PHPUnit and Pest, two testing frameworks for PHP and Laravel, with real examples from our work.

PHPUnit vs Pest: What Are the Main Differences?

PHPUnit is the historic framework, born in 2004. Pest is the newcomer (2019) that uses PHPUnit under the hood but radically changes syntax and writing experience. Both do the same thing: execute assertions on your classes. But the way you write them is different.

PHPUnit follows a class-based approach: each test is a method inside a class extending PHPUnit\Framework\TestCase. Pest uses global functions and a fluent syntax, inspired by Jest (JavaScript). Pest is a wrapper around PHPUnit: you can use all PHPUnit methods from Pest, but with less boilerplate.

Here's a visual comparison. Same test for a sum:

// PHPUnit
use PHPUnit\Framework\TestCase;

class MathTest extends TestCase
{
    public function test_addition()
    {
        $result = 1 + 1;
        $this->assertEquals(2, $result);
    }
}

// Pest
test('addition')
    ->with(1, 1)
    ->assertTrue(2 === 1 + 1);

Notice: with Pest you don't need to create a class or extend anything. You write a test() function and chain assertions. For many developers it's more readable and faster to write.

How to Write Tests with PHPUnit in Laravel?

Laravel integrates PHPUnit by default. Tests go in tests/Unit and tests/Feature. Here's a real example: testing that an API route returns correct JSON.

// tests/Feature/UserApiTest.php
namespace Tests\Feature;

use Tests\TestCase;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;

class UserApiTest extends TestCase
{
    use RefreshDatabase;

    public function test_can_fetch_users()
    {
        User::factory()->count(3)->create();

        $response = $this->getJson('/api/users');

        $response->assertStatus(200)
                 ->assertJsonCount(3)
                 ->assertJsonStructure([
                     '*' => ['id', 'name', 'email']
                 ]);
    }
}

We use RefreshDatabase to get a clean database every test. assertJsonCount and assertJsonStructure are Laravel methods that make tests expressive.

What to do now: open your Laravel project, go to tests/Feature and create a test for one of your routes. Run php artisan test to see it pass.

How to Write Tests with Pest in Laravel?

Pest is installed via Composer and can become the default runner. The same test in Pest becomes:

// tests/Feature/UserApiTest.php
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;

uses(RefreshDatabase::class);

test('can fetch users via API', function () {
    User::factory()->count(3)->create();

    $response = $this->getJson('/api/users');

    $response->assertStatus(200)
             ->assertJsonCount(3)
             ->assertJsonStructure([
                 '*' => ['id', 'name', 'email']
             ]);
});

The main difference is the uses() function to apply traits globally, and the absence of a class. Note that $this still exists thanks to Pest's automatic binding.

Pest also offers higher-order functions like beforeEach() and afterEach() for context setup, and groups with describe():

describe('User API', function () {
    beforeEach(function () {
        $this->user = User::factory()->create();
    });

    test('can list users', function () {
        $response = $this->getJson('/api/users');
        $response->assertOk();
    });

    test('can create a user', function () {
        $response = $this->postJson('/api/users', [
            'name' => 'Marco',
            'email' => 'marco@example.com',
            'password' => 'secret'
        ]);
        $response->assertCreated();
    });
});

What to do now: install Pest with composer require pestphp/pest --dev, then run php artisan pest:init. Convert one of your existing tests into Pest to feel the difference.

PHPUnit or Pest: Which One Should You Choose for Your Project?

The choice depends on your team and context. At Meteora Web we use both. On new Laravel projects we prefer Pest for speed and readability. On legacy codebases with hundreds of PHPUnit tests, we don't migrate: the time spent rewriting isn't worth it.

Here's a decision checklist:

• Choose PHPUnit if: your team is familiar, you have many existing tests, or you need compatibility with CI tools that don't recognize Pest (rare).
• Choose Pest if: you start a new project, want more readable tests, or have developers coming from Jest/Mocha.
• Use both if: you want a gradual transition. Pest can run PHPUnit tests without issues.

Remember: the framework matters less than the testing culture. We've seen companies with perfect PHPUnit and companies with messy Pest. The difference is discipline: test before releasing, cover critical cases, keep tests green.

A Real Example with Mocking and Database

Let's take a concrete case: a service that applies a discount to an order. We'll use mocks to isolate dependencies.

// App\Services\DiscountService
class DiscountService
{
    public function apply(Order $order, Coupon $coupon): float
    {
        if (! $coupon->isValid()) {
            return $order->total;
        }
        return $order->total * (1 - $coupon->percentage);
    }
}

// Test with PHPUnit
class DiscountServiceTest extends TestCase
{
    public function test_applies_discount_when_coupon_valid()
    {
        $coupon = $this->createMock(Coupon::class);
        $coupon->method('isValid')->willReturn(true);
        $coupon->percentage = 0.2;

        $order = new Order(['total' => 100]);

        $service = new DiscountService();
        $result = $service->apply($order, $coupon);

        $this->assertEquals(80.0, $result);
    }
}

// Test with Pest
test('applies discount when coupon valid', function () {
    $coupon = Mockery::mock(Coupon::class);
    $coupon->shouldReceive('isValid')->andReturn(true);
    $coupon->percentage = 0.2;

    $order = new Order(['total' => 100]);
    $service = new DiscountService();

    expect($service->apply($order, $coupon))->toBe(80.0);
});

Note: in Pest you can use the same PHPUnit mocking or Mockery (which has a more fluent syntax). There's no right answer; the important thing is to test.

How to Integrate PHPUnit and Pest in Your CI Workflow

Both integrate with GitHub Actions, GitLab CI, or any tool. The command is always php artisan test (which uses PHPUnit by default) or ./vendor/bin/pest if Pest is your runner. We recommend running tests on every pull request and blocking merge if they fail.

# .github/workflows/tests.yml
name: Tests
on: [push, pull_request]
jobs:
  phpunit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: shivammathur/setup-php@v2
        with:
          php-version: '8.3'
          tools: composer
      - run: composer install --no-progress
      - run: php artisan test

What to do now: add a test workflow to your repository. If you don't have one, start with this example.

What to Do Next

1. Write a test for a function you use today. No need for a full project: start with a simple class (e.g., a date formatting helper).
2. Install Pest on an existing Laravel project and convert one test to see if you like it. No need to migrate everything.
3. Add a CI workflow to run tests automatically. It's the fastest way to avoid regressions.
4. Read the official documentation for PHPUnit and Pest to dive deeper into mocking and feature tests.

We, at Meteora Web, have seen projects saved by a solid test suite. If you need help setting up tests in your Laravel project, start with our testing pillar page.