Hi Valentin, Ruby 2.7 has now been made default (previously Ruby 2.5). We're working on making ruby-defaults migrate to testing which is being blocked by a couple of packages, out of which, one is pcs. As per the logs[1], it seems that you just need to add: Restrictions: allow-stderr in d/tests/control.
Hope you could do this asap and help us get Ruby 2.7 in testing :) If you're not able to do it on your own, I'll be happy to fix this myself via an NMU. Let me know if you have any questions. Best, Utkarsh --- [1]: https://ci.debian.net/data/autopkgtest/testing/amd64/p/pcs/4832376/log.gz
