unittest vs Pest

Free and open source

Free and open source

Free and open source. You pay in engineering time and CI minutes.

Free and open source. You pay in engineering time and CI minutes.

Everything, self-hosted

Everything, self-hosted

Widely used

Python Software Foundation · since 2001

Widely used

Pest / Laravel community · since 2020

• In the standard library — nothing to install or vet.
• unittest.mock is excellent and used almost universally in Python.
• Familiar to anyone coming from JUnit or NUnit.

• Much less boilerplate than raw PHPUnit for the same coverage.
• Architecture testing — enforcing layering rules as tests — is a genuinely useful addition.
• Fully compatible with existing PHPUnit tests, so adoption is incremental.

• Verbose compared to pytest for the same coverage.
• No parametrisation or fixture composition worth the name.
• Most teams run unittest tests through pytest anyway.

• Another abstraction layer to debug when something goes wrong underneath.
• Strongest in the Laravel world; thinner elsewhere.
• Smaller ecosystem of examples than PHPUnit.

Standard-library-only environments and codebases that already use it.

Laravel teams and modern PHP projects that find PHPUnit verbose.