Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\laragon\www\siesicis\vendor\phpoffice\phpexcel\unitTests\Classes\PHPExcel\ReferenceHelperTest.php:4 Stack trace: #0 {main} thrown in C:\laragon\www\siesicis\vendor\phpoffice\phpexcel\unitTests\Classes\PHPExcel\ReferenceHelperTest.php on line 4