tcpdns_test failed on Alpine

Job #1384902 failed for 6c0e1723 on main. Job artifact is gone, but running the test locally in a loop I get the following after 10 minutes, no core present though:

[==========] Running 8 test(s).
[ RUN      ] tcpdns_recv_one
[       OK ] tcpdns_recv_one
[ RUN      ] tcpdns_recv_two
[       OK ] tcpdns_recv_two
[ RUN      ] tcpdns_noop
[       OK ] tcpdns_noop
[ RUN      ] tcpdns_noresponse
[       OK ] tcpdns_noresponse
[ RUN      ] tcpdns_recv_send
[       OK ] tcpdns_recv_send
[ RUN      ] tcpdns_recv_half_send
[       OK ] tcpdns_recv_half_send
[ RUN      ] tcpdns_half_recv_send
setup_ephemeral_port: bind(): Address in use
Could not run test: Test setup failed
[  ERROR   ] tcpdns_half_recv_send
[ RUN      ] tcpdns_half_recv_half_send
setup_ephemeral_port: bind(): Address in use
Could not run test: Test setup failed
[  ERROR   ] tcpdns_half_recv_half_send
[==========] 8 test(s) run.
[  PASSED  ] 6 test(s).