Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAVACL/Xml/Property/PrincipalTest.php:10 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAVACL/Xml/Property/PrincipalTest.php on line 10