Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ~9 -> satisfiable by phpunit/phpunit[9.0.0, ..., 9.6.29]. - phpunit/phpunit[9.0.0, ..., 9.2.6] require php ^7.3 -> your php version (8.2; overridden via config.platform, actual: 8.3.6) does not satisfy that requirement. - phpunit/phpunit[9.3.8, ..., 9.3.10] require phpunit/php-code-coverage ^9.1.5 -> found phpunit/php-code-coverage[9.1.5, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit 9.3.11 requires phpunit/php-code-coverage ^9.1.11 -> found phpunit/php-code-coverage[9.1.11, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.3.0, ..., 9.3.3] require phpunit/php-code-coverage ^9.0 -> found phpunit/php-code-coverage[9.0.0, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.3.4, ..., 9.3.7] require phpunit/php-code-coverage ^9.1.1 -> found phpunit/php-code-coverage[9.1.1, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.4.0, ..., 9.4.4] require phpunit/php-code-coverage ^9.2 -> found phpunit/php-code-coverage[9.2.0, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.5.10, ..., 9.5.14] require phpunit/php-code-coverage ^9.2.7 -> found phpunit/php-code-coverage[9.2.7, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.5.16, ..., 9.6.11] require phpunit/php-code-coverage ^9.2.13 -> found phpunit/php-code-coverage[9.2.13, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.5.0, ..., 9.5.9] require phpunit/php-code-coverage ^9.2.3 -> found phpunit/php-code-coverage[9.2.3, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.6.12, ..., 9.6.19] require phpunit/php-code-coverage ^9.2.28 -> found phpunit/php-code-coverage[9.2.28, ..., 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit 9.6.20 requires phpunit/php-code-coverage ^9.2.31 -> found phpunit/php-code-coverage[9.2.31, 9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.6.21, ..., 9.6.29] require phpunit/php-code-coverage ^9.2.32 -> found phpunit/php-code-coverage[9.2.32] but the package is fixed to 11.0.11 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.