Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires orchestra/testbench 9.* -> satisfiable by orchestra/testbench[9.x-dev]. - orchestra/testbench 9.x-dev requires php ^8.2 -> your php version (8.1.27) does not satisfy that requirement. Problem 2 - laravel/framework dev-master requires php ^8.2 -> your php version (8.1.27) does not satisfy that requirement. - laravel/framework 11.x-dev is an alias of laravel/framework dev-master and thus requires it to be installed too. - Root composer.json requires laravel/framework 11.* -> satisfiable by laravel/framework[11.x-dev (alias of dev-master)].