The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available for Linux, Solaris, macOS, Windows, and BSD operating systems.
The objective of ParaTest is to support parallel testing in PHPUnit. Provided you have well-written PHPUnit tests, you can drop paratest in your project and start using it with no additional bootstrap or configurations!
Broadway is a project providing infrastructure and testing helpers for creating CQRS and event sourced applications. Broadway tries hard to not get in your way.
Humbug is a Mutation Testing framework for PHP to measure the real effectiveness of your test suites and assist in their improvement. It eats Code Coverage for breakfast.
Removes final keywords from source code on-the-fly and allows mocking of final methods and classes. It can be used together with any test tool such as PHPUnit or Mockery.