"make check" fail at test_program_refused

Hello,

I moved my buildsystem to an other platform (I do not fully control)
and now receive this error on "make check"

Error: program tcp:127.0.0.2:42027: connect(::1) failed: Connection refused test_program_refused .................................................
: FAILED

The build run on jenkins buildnodex spawn up on a kubernetes cluster.

What I noticed so far: the buildnode opereate ipv4 only but has an
entry in /etc/hosts:

127.0.0.1 c4a84c76f0d6 ::1 c4a84c76f0d6

Maybe that's the glitch ...

I tried dovecot-2.3.15 and 2.3.19.1. Both fail (only the portnumber differ)

Is there an option to disable only one specific test? I dislike to
skip "make check" at all.

Andreas