Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/demoinvfsanz/public_html/vendor/jeremeamia/superclosure/tests/Unit/SerializableClosureTest.php:20 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/jeremeamia/superclosure/tests/Unit/SerializableClosureTest.php on line 20