Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nunomaduro/collision ^8.4.0 -> satisfiable by nunomaduro/collision[v8.4.0]. - nunomaduro/collision v8.4.0 requires php ^8.2.0 -> your php version (8.1.29) does not satisfy that requirement. Problem 2 - pestphp/pest[v2.6.1, ..., v2.6.3] require nunomaduro/collision ^7.5.2 -> found nunomaduro/collision[v7.5.2, ..., v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - pestphp/pest[v2.7.0, ..., v2.8.1] require nunomaduro/collision ^7.6.0 -> found nunomaduro/collision[v7.6.0, ..., v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - pestphp/pest[v2.8.2, ..., v2.12.0] require nunomaduro/collision ^7.7.0 -> found nunomaduro/collision[v7.7.0, ..., v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - pestphp/pest v2.12.1 requires nunomaduro/collision ^7.8.0 -> found nunomaduro/collision[v7.8.0, v7.8.1, v7.9.0, v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - pestphp/pest[v2.12.2, ..., v2.19.1] require nunomaduro/collision ^7.8.1 -> found nunomaduro/collision[v7.8.1, v7.9.0, v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - pestphp/pest[v2.19.2, ..., v2.22.1] require nunomaduro/collision ^7.9.0 -> found nunomaduro/collision[v7.9.0, v7.10.0] but it conflicts with your root composer.json require (^8.4.0). - nunomaduro/collision v8.4.0 requires php ^8.2.0 -> your php version (8.1.29) does not satisfy that requirement. - pestphp/pest-plugin-mock v2.0.0 requires pestphp/pest ^2.0.0 -> satisfiable by pestphp/pest[v2.6.1, ..., v2.35.0]. - pestphp/pest v2.35.0 requires nunomaduro/collision ^7.10.0|^8.3.0 -> satisfiable by nunomaduro/collision[v8.4.0]. - pestphp/pest[v2.34.2, ..., v2.34.9] require nunomaduro/collision ^7.10.0|^8.1.1 -> satisfiable by nunomaduro/collision[v8.4.0]. - pestphp/pest[v2.32.0, ..., v2.34.1] require nunomaduro/collision ^7.10.0|^8.1.0 -> satisfiable by nunomaduro/collision[v8.4.0]. - pestphp/pest[v2.29.0, ..., v2.31.0] require nunomaduro/collision ^7.10.0|^8.0.1 -> satisfiable by nunomaduro/collision[v8.4.0]. - pestphp/pest[v2.24.0, ..., v2.28.1] require nunomaduro/collision ^7.10.0|^8.0.0 -> satisfiable by nunomaduro/collision[v8.4.0]. - pestphp/pest[v2.23.0, ..., v2.23.2] require nunomaduro/collision ^7.9.0|^8.0.0 -> satisfiable by nunomaduro/collision[v8.4.0]. - Root composer.json requires pestphp/pest-plugin-mock ^2.0.0 -> satisfiable by pestphp/pest-plugin-mock[v2.0.0].