Hi,

You can take the dump of your database backup and restore it in a different database name by neutralizing it for the test purpose.To take the backup of your DB you can set the URL of your browser to domain/web/database/manager.Then you can see a backup button near your DB click on it and take backup

To restore the DB you can set the URL of your browser to domain/web/database/manager.Then you can see a restore button to restore the DB backup file, and you can import the zip file there

You can enable the option neutralize for the test DB if it needed.

Hope it helps