Hello. Thank you for reporting this. I just looked at it for a bit. The failure you're seeing results from a test taking too long for whatever reason. On my local machine I cannot reproduce it, unless I manually adjust the test timeout to be very small.
The default is 30 sec: https://salsa.debian.org/debian/remake/-/blob/master/tests/scripts/features/output-sync#L56 One simple "solution" is to simply bump up the timeout threshold. Since I cannot reproduce this on my own machine (a laptop from 2013!), and it has never come up before, I'm wondering if something about your test setup is triggering it. The tests create small test Makefiles and scenario files and invoke "remake" on them. This accesses files on disk. If you're on an instance with a shared disk, could those file access be slower than expected? Are you able to test a bigger timeout? If not, I would appreciate access to a machine where you're seeing the problem, so that I could create and confirm a fix myself. Thanks
