Codeception

Supports acceptance, functional, and unit tests in one framework, eliminating the need to switch tools for different testing layers as highlighted in the README's key features.

Allows writing descriptive test scenarios in plain PHP, making tests more readable and maintainable, which aligns with the project's philosophy of modernizing PHP testing.

Can run classic PHPUnit tests alongside Codeception tests, easing migration for teams already using PHPUnit, as noted in the key features.

Displays actions and results during test execution, providing clearer insights into failures, which is emphasized in the 'At a Glance' section.