Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/php-code-coverage 11.0.8 requires nikic/php-parser ^5.3.1 -> found nikic/php-parser[v5.3.1] but it conflicts with your root composer.json require (^4.16.0). - phpunit/phpunit 11.5.2 requires phpunit/php-code-coverage ^11.0.8 -> satisfiable by phpunit/php-code-coverage[11.0.8]. - Root composer.json requires phpunit/phpunit ^11.5.2 -> satisfiable by phpunit/phpunit[11.5.2]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.