Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nunomaduro/collision ^8.1.0 -> satisfiable by nunomaduro/collision[v8.1.0, v8.x-dev]. - nunomaduro/collision[v8.1.0, ..., v8.x-dev] require php ^8.2.0 -> your php version (8.1.27) does not satisfy that requirement. Problem 2 - pestphp/pest[v1.21.0, ..., v1.21.1] require nunomaduro/collision ^5.4.0|^6.0 -> found nunomaduro/collision[dev-develop, v5.4.0, ..., v5.x-dev, v6.0.0, ..., 6.x-dev (alias of dev-develop)] but it conflicts with your root composer.json require (^8.1.0). - pestphp/pest[v1.21.2, ..., v1.22.1] require nunomaduro/collision ^5.10.0|^6.0 -> found nunomaduro/collision[dev-develop, v5.10.0, v5.11.0, v5.x-dev, v6.0.0, ..., 6.x-dev (alias of dev-develop)] but it conflicts with your root composer.json require (^8.1.0). - pestphp/pest[v1.22.2, ..., v1.22.5] require nunomaduro/collision ^5.11.0|^6.3.0 -> found nunomaduro/collision[dev-develop, v5.11.0, v5.x-dev, v6.3.0, ..., 6.x-dev (alias of dev-develop)] but it conflicts with your root composer.json require (^8.1.0). - pestphp/pest[v1.22.6, ..., 1.x-dev] require nunomaduro/collision ^5.11.0|^6.4.0 -> found nunomaduro/collision[dev-develop, v5.11.0, v5.x-dev, v6.4.0, 6.x-dev (alias of dev-develop)] but it conflicts with your root composer.json require (^8.1.0). - Root composer.json requires pestphp/pest ^1.21 -> satisfiable by pestphp/pest[v1.21.0, ..., 1.x-dev].