Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires orchestra/testbench 10.* -> satisfiable by orchestra/testbench[v10.0.0, ..., v10.9.0]. - orchestra/testbench[v10.0.0, ..., v10.1.0] require phpunit/phpunit ^11.5.3 -> found phpunit/phpunit[11.5.3, ..., 11.5.48] but it conflicts with your root composer.json require (^8.0). - orchestra/testbench[v10.2.0, ..., v10.9.0] require phpunit/phpunit ^11.5.3|^12.0.1 -> found phpunit/phpunit[11.5.3, ..., 11.5.48, 12.0.1, ..., 12.5.6] but it conflicts with your root composer.json require (^8.0).