Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires orchestra/testbench 10.* -> satisfiable by orchestra/testbench[v10.0.0, v10.1.0, 10.x-dev]. - Root composer.json requires phpspec/phpspec ~5.1.1 || ^6.0 || ^7.0 -> satisfiable by phpspec/phpspec[5.1.1, 5.1.2, 5.1.x-dev, 6.0.0, ..., 6.3.x-dev, 7.0.0, ..., 7.5.x-dev]. - orchestra/testbench[v10.0.0, ..., 10.x-dev] require phpunit/phpunit ^11.5.3 -> satisfiable by phpunit/phpunit[11.5.3, ..., 11.5.x-dev]. - phpunit/phpunit[11.5.3, ..., 11.5.x-dev] require sebastian/exporter ^6.3.0 -> satisfiable by sebastian/exporter[6.3.0, 6.3.x-dev]. - Conclusion: don't install sebastian/exporter 6.3.0 (conflict analysis result)