Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/a2billing/vendor/phpunit/phpunit-mock-objects/tests/MockBuilderTest.php:14 Stack trace: #0 {main} thrown in /var/www/html/a2billing/vendor/phpunit/phpunit-mock-objects/tests/MockBuilderTest.php on line 14