Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pestphp/pest ^2.34 -> satisfiable by pestphp/pest[v2.34.0, ..., 2.x-dev]. - pestphp/pest[v2.34.0, ..., 2.x-dev] require pestphp/pest-plugin-arch ^2.7.0 -> found pestphp/pest-plugin-arch[v2.7.0, 2.x-dev] but it conflicts with your root composer.json require (^3.0).