Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/www/act.com.cy/wp-content/plugins/mailoptin/vendor/ralouphie/getallheaders/tests/GetAllHeadersTest.php:3 Stack trace: #0 {main} thrown in /home/www/act.com.cy/wp-content/plugins/mailoptin/vendor/ralouphie/getallheaders/tests/GetAllHeadersTest.php on line 3