Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^13.0 -> satisfiable by phpunit/phpunit[13.0.0, ..., 13.3.x-dev]. - phpunit/phpunit[13.0.0, ..., 13.3.x-dev] require php >=8.4.1 -> your php version (7.4.33) does not satisfy that requirement.