Hi,

Somehow these tests have recently become unstable and have failed a few times:

https://github.com/postgres/postgres/commits/REL_15_STABLE

The failures are like:

[22:32:26.722] # Failed test 'pgbench simple update stdout
/(?^:builtin: simple update)/'
[22:32:26.722] # at t/001_pgbench_with_server.pl line 119.
[22:32:26.722] # 'pgbench (15.4)
[22:32:26.722] # '
[22:32:26.722] # doesn't match '(?^:builtin: simple update)'