Sonia Bouis stepped in to fill a vacant presentation slot with a demo of the Koha sandboxes and showing how to sign off bugs.
She started with a demo of our bugzilla at bugs.koha-community.org and showed how to pick a bug that is testable with the sandboxes
Once you have found a bug in bugzilla, you can now go to the sandboxes to test, some sandboxes are MARC21 and some are UNIMARC, be careful to choose the appropriate one for you.