Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires illuminate/contracts ^11.0||^12.0 -> satisfiable by illuminate/contracts[v11.0.0, ..., 11.x-dev, v12.0.0, ..., 12.x-dev]. - Root composer.json requires pestphp/pest-plugin-laravel ^4.0 -> satisfiable by pestphp/pest-plugin-laravel[v4.0.0, v4.1.0, 4.x-dev]. - pestphp/pest-plugin-laravel v4.0.0 requires laravel/framework ^11.45.2|^12.25.0 -> found laravel/framework[v11.45.2, ..., 11.x-dev, v12.25.0, ..., 12.x-dev] but it conflicts with your root composer.json require (13.*). - pestphp/pest-plugin-laravel[v4.1.0, ..., 4.x-dev] require laravel/framework ^11.45.2|^12.52.0|^13.0 -> satisfiable by laravel/framework[v13.0.0, ..., 13.x-dev]. - Conclusion: don't install illuminate/contracts v11.0.0 (conflict analysis result) - Conclusion: don't install illuminate/contracts v11.15.0 (conflict analysis result) - Conclusion: don't install illuminate/contracts v11.28.0 (conflict analysis result) - Conclusion: don't install illuminate/contracts v11.41.3 (conflict analysis result) - Conclusion: don't install illuminate/contracts v11.43.0 (conflict analysis result) - Conclusion: don't install illuminate/contracts v11.44.2 (conflict analysis result) - Conclusion: don't install illuminate/contracts v12.0.0 (conflict analysis result) - Only one of these can be installed: laravel/framework[dev-master, v13.0.0, ..., 13.x-dev], illuminate/contracts[v11.0.0, ..., 11.x-dev, v12.0.0, ..., 12.x-dev]. laravel/framework replaces illuminate/contracts and thus cannot coexist with it. - laravel/framework 13.0.x-dev is an alias of laravel/framework dev-master and thus requires it to be installed too.