Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires draw/tester dev-master -> satisfiable by draw/tester[dev-master]. - draw/tester dev-master requires phpunit/phpunit ^10.0 -> found phpunit/phpunit[10.0.0, ..., 10.5.x-dev] but it conflicts with your root composer.json require (^11.3).