Allow use a separate DB configuration (not just prefix) for Behat similar to PHPUnit

Create a new database named behatdb Create a new user and grant all permissions to behatdb database (username newusername, password newpass) Add in config.php the next settings: $CFG->behat_prefix = 'b_'; $CFG->behat_dbname = 'behatdb'; $CFG->behat_dbuser = 'newusername'; $CFG->behat_dbpass = 'newpass'; Run: php admin/tool/behat/cli/init.php Make sure that the tables are created in the NEW database. Remove  $CFG->behat_dbname ,  $CFG->behat_dbuser and  $CFG->behat_dbpass from config.php Run again: php admin/tool/behat/cli/init.php Make sure that the tables are created in the ORIGINAL moodle database. Change $CFG->behat_prefix and give it the same value as  $CFG->prefix in config.php Run again: php admin/tool/behat/cli/init.php Make sure that you get an error. Add again in config.php the next settings: $CFG->behat_dbname = 'behatdb'; $CFG->behat_dbuser = 'newusername'; $CFG->behat_dbpass = 'newpass'; Run again: php admin/tool/behat/cli/init.php Make sure that the tables are created in the NEW database even when the prefix is the same. Edit again config.php, and use an unexisting dbuser or a wrong password for the dbuser: Run again: php admin/tool/behat/cli/init.php Make sure that you get an error.