Fatal error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/Tests/EventTest.php on line 21

Call Stack:
    0.0003     246792   1. {main}() /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/Tests/EventTest.php:0