Fatal error: Uncaught Error: Class "TestCase" not found in /opt/lampp/htdocs/msjperformancemsn/vendor/maatwebsite/excel/tests/Readers/ReaderTest.php:7 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjperformancemsn/vendor/maatwebsite/excel/tests/Readers/ReaderTest.php on line 7