[phpMyAdmin Developers] Getting a PHPUnit_Extensions_Selenium2TestCase not found issue

Dear Developers, I'm trying to launch the test suite by running the following command from the root of phpmyadmin folder. "phpunit -c phpunit.xml.nocoverage" But, I'm receiving the following error. ' *PHP Fatal error: Class 'PHPUnit_Extensions_Selenium2TestCase' not found in /my_local_path/phpmyadmin/test/selenium/TestBase.php on line 18'* The installation of phpunit was done via composer and it was successful. Could you think of any other problem which might be causing this issue for me ? PHP version 5.6.17 PHPUnit version 5.1.4 Thanks in advance. -- Best Regards Lakmal