Hi, Me (and Victor) have not been able to attend the buildbots for a while unfortunately and today I was checking them out after some fixes to the SSL tests and sadly the refleaks buildbots have many independent issues. At least these tests are failing due to reference leaks: test__xxsubinterpreters, test_atexit, test_capi, test_httpservers, test_threading I am trying to slowly fix them but finding them and debugging often takes several hours per leak. I was tracking them in https://bugs.python.org/issue38962 until I discover that there are multiple sources of leaks so I may open more issues. Please, when you merge a PR, take a look at the buildbots (especially the refleak buildbots that do not report still to the PR in case of failure) so the issues don't keep piling up, as multiple refleaks together are much difficult to deal with. Thanks, everyone! Regards from cloudy London, Pablo Galindo Salgado