Fatal error: Uncaught Error: Interface 'PHPUnit\Runner\TestSuiteLoader' not found in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/SuiteLoader.php:18 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/SuiteLoader.php on line 18