Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/wp-content/plugins/sg-security/vendor/charles-rumley/php-po-to-json/tests/PoToJsonTest.php:6 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/sg-security/vendor/charles-rumley/php-po-to-json/tests/PoToJsonTest.php on line 6