Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/demoinvfsanz/public_html/vendor/myclabs/deep-copy/tests/DeepCopyTest/DeepCopyTest.php:37 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/myclabs/deep-copy/tests/DeepCopyTest/DeepCopyTest.php on line 37