Fatal error: Uncaught Error: Class "WP_CLI\Tests\TestCase" not found in /home/myclienteu/croix-souris/vendor/wp-cli/package-command/tests/JsonManipulatorTest.php:17 Stack trace: #0 {main} thrown in /home/myclienteu/croix-souris/vendor/wp-cli/package-command/tests/JsonManipulatorTest.php on line 17