Your requirements could not be resolved to an installable set of packages. Problem 1 - sinnbeck/laravel-dom-assertions[v1.3.0, ..., v1.4.1] require illuminate/testing ^9.0|^10.0 -> satisfiable by illuminate/testing[v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. - Only one of these can be installed: illuminate/testing[v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev], laravel/framework[dev-master]. laravel/framework replaces illuminate/testing and thus cannot coexist with it. - laravel/framework 11.x-dev is an alias of laravel/framework dev-master and thus requires it to be installed too. - illuminate/testing[v9.0.0-beta.1, ..., 9.x-dev] require illuminate/contracts ^9.0 -> found illuminate/contracts[v9.0.0-beta.1, ..., 9.x-dev] but it conflicts with your root composer.json require (^10.0|^11.0). - Root composer.json requires laravel/framework 11.* -> satisfiable by laravel/framework[11.x-dev (alias of dev-master)]. - Root composer.json requires sinnbeck/laravel-dom-assertions ^1.3 -> satisfiable by sinnbeck/laravel-dom-assertions[v1.3.0, v1.3.1, v1.4.0, v1.4.1].