Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench-core 9.x-dev conflicts with nunomaduro/collision <8.0.0 || >=9.0.0. - orchestra/testbench 9.x-dev requires orchestra/testbench-core ^9.0 -> satisfiable by orchestra/testbench-core[9.x-dev]. - Root composer.json requires orchestra/testbench ^9.0 -> satisfiable by orchestra/testbench[9.x-dev]. - Root composer.json requires nunomaduro/collision ^6.0 -> satisfiable by nunomaduro/collision[v6.0.0, ..., v6.x-dev].