$ cd /opt
$ git clone https://github.com/nikic/php-ast
$ cd php-ast && phpize && ./configure && make && make install
$ echo 'extension=ast.so' > /usr/local/etc/php/conf.d/ast.ini
$ cd /var/wwwroot/default
$ composer install
$ php artisan config:clear
Configuration cache cleared!
$ php artisan cache:clear
Cache cleared successfully.
$ vendor/bin/phpunit
PHPUnit 4.8.31 by Sebastian Bergmann and contributors.
Warning:        The Xdebug extension is not loaded
                No code coverage will be generated.