Recently I have tested Koha (Latest Old Stable Release) on Debian 10 Buster. You can use this virtual machine for testing purpose.
Please use Oracle VM VirtualBox as a platform to add this machine.
Recently I have tested DSpace 6.3 on Debian 9.13 Stretch. You can use this virtual machine for testing purpose.
Please use Oracle VM VirtualBox as a platform to add this machine.