If a test database is found, this is a sign that the mysql_secure_installation script was not ran when the database software was installed. It is recommended to do so. This script will prompt the user to set the MariaDB root user's password, remove all anonymous users, disallow the root user from logging in remotely to the database, remove the test database and access to it, and then reload the privilege tables. $ mariadb-secure-installation reply Y to setting a root password if one is not already set. reply Y to Remove anonymous users reply Y to disallow root login remotely reply Y to Remove test database and access to it reply Y to Reload privilege tables now (this ensures that all changes made so far will take effect immediately) Note: For this request only the "reply Y to Remove" test database and access to it is necessary, but "Y" to all the questions is recommended. Alternatively, simply dropping the test database will remedy the finding. MariaDB> DROP DATABASE test;