Fatal error: Uncaught Error: Class 'React\Tests\Dns\TestCase' not found in /var/www/html/stz-api/vendor/react/dns/tests/Resolver/FactoryTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/stz-api/vendor/react/dns/tests/Resolver/FactoryTest.php on line 9