Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-indexer/Test/Unit/Controller/Adminhtml/Indexer/MassInvalidateTest.php:35 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-indexer/Test/Unit/Controller/Adminhtml/Indexer/MassInvalidateTest.php on line 35