"doth" test failing in 9.18.3

[Josef Moellers]

Hi,

I'm in the process of upgrading openSUSE Tumbleweed to bind 9.18.3 and 
in doing so, also run the test suite. However, it fails in step
FAIL: doth

The log file says
I:doth:testing incoming XoT functionality (from the first secondary) (2)
I:doth:timed out waiting for zone transfer

Is there anything I am missing?
There is no firewall.

Josef
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