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[v9.0.0]. - orchestra/testbench v9.0.0 requires phpunit/phpunit ^10.5 || ^11.0.1 -> found phpunit/phpunit[10.5.0, ..., 10.5.13, 11.0.1, ..., 11.0.6] but it conflicts with your root composer.json require (^8.0|^9.0).