The problem was, that a package could not be downloaded:
833s fai.log:W: Couldn't download package libip4tc2 (ver 1.8.9-2 arch amd64) at http://deb.debian.org/debian/pool/main/i/iptables/libip4tc2_1.8.9-2_amd64.deb Another test run passed without any errors. See 46897030 https://ci.debian.net/packages/f/fai/testing/amd64/ Does this solve your problem? Can we close this bug now? -- Thomas