This resulted in #144878 and, the following day, #144927.

The test requires the 'xpickle' resource (and for various Python versions to be installed) but it is not included in ALL_RESOURCES, so currently it is not run on any buildbot:

Some options:

1. Adding the resource to all. @serhiy-storchaka there is no comment above explaining why it was excluded, did it cause issues?
2. Run it in the CI, this would be best done as a separate job, since it requires several installed python versions.
3. Run it on a buildbot.