Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/html/simplesamlphp/vendor/squizlabs/php_codesniffer/tests/Core/AbstractMethodTestCase.php:21
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/vendor/squizlabs/php_codesniffer/tests/Core/AbstractMethodTestCase.php on line 21