Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/w/vendor/jeroen/batching-iterator/tests/unit/Fetchers/InMemoryBatchingFetcherTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/w/vendor/jeroen/batching-iterator/tests/unit/Fetchers/InMemoryBatchingFetcherTest.php on line 16