Two Ways to Write the Same Tests
Pest and PHPUnit aren’t fundamentally different testing engines — Pest is built on top of PHPUnit and uses the same assertion library and test runner underneath. The real difference is syntax and developer experience, and Laravel supports both as first-class citizens.
PHPUnit: The Established Standard
PHPUnit’s class-based syntax is verbose but explicit, and it’s what most PHP developers already know from other frameworks. If your team has deep PHPUnit experience, or you’re integrating with existing tooling built around PHPUnit’s XML configuration and annotations, sticking with it is a perfectly reasonable choice.
Pest: A Lighter-Weight Alternative
Pest replaces class-based test methods with simple functions — test('it does something', function () { ... }) — which reads closer to natural language and reduces boilerplate. Its plugin ecosystem adds convenient helpers for Laravel-specific testing, architecture testing (asserting things like “no controller may depend directly on Eloquent models”), and expressive higher-order expectations.
Feature Tests vs Unit Tests
Regardless of syntax choice, the more important decision is what to test. Feature tests that hit real routes, middleware, and database interactions catch the bugs that actually break production — a misconfigured route, a missing middleware, a broken validation rule. Pure unit tests that mock every dependency are faster but can pass while the integrated system is broken. A healthy Laravel test suite leans heavily toward feature tests, with unit tests reserved for complex, isolated logic like pricing calculations or business rule engines.
Database Testing Strategy
Use the RefreshDatabase trait to reset your test database between tests, and prefer factories over fixtures for generating test data — they’re more maintainable as your schema evolves. Avoid testing against your production database driver if you can help it; SQLite in-memory databases are fast for most test suites, though be aware of subtle SQL dialect differences if your production database is MySQL or Postgres.
The Practical Verdict
For new projects, Pest’s cleaner syntax and Laravel-specific plugins make it an easy recommendation, especially for smaller teams. For large existing PHPUnit codebases, migrating purely for syntax isn’t usually worth the churn — both let you write the tests that actually matter, and that matters far more than the syntax you write them in.