Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-cache-storage-adapter-test ^4.1 -> satisfiable by laminas/laminas-cache-storage-adapter-test[4.1.0]. - laminas/laminas-cache-storage-adapter-test 4.1.0 requires phpunit/phpunit ^10.5 -> found phpunit/phpunit[10.5.0, ..., 10.5.45] but it conflicts with your root composer.json require (^12.0.0). Problem 2 - Root composer.json requires phpunit/phpunit ^12.0.0 -> satisfiable by phpunit/phpunit[12.0.0, 12.0.1, 12.0.2]. - phpunit/phpunit[12.0.0, ..., 12.0.2] require php >=8.3 -> your php version (8.2.27) does not satisfy that requirement. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.