Fatal error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/dev/spa/vendor/symfony/debug/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php on line 31

Call Stack:
    0.0008     303032   1. {main}() /var/www/html/dev/spa/vendor/symfony/debug/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php:0