Peter Eisentraut <peter(at)eisentraut(dot)org> writes:
> Update plpython_subtransaction alternative expected files
> The original patch only targeted Python 2.6 and newer, since that is
> what we have supported in PostgreSQL 13 and newer. For older
> branches, we need to fix it up for older Python versions.
I think you need to fix that down to 9.6, not just v12.
regards, tom lane