DRIVERS-2490: The server is removing support for the getNonce command via SERVER-71007 . getNonce was used for implementing the MONGODB-CR authentication mechanism, which was removed from the server in MongoDB 4.0. Drivers need to: 1) Verify they do not have any logic or non-spec tests that would send getNonce to a 6.2+ server. 2) Sync command logging and monitoring spec tests to: https://github.com/mongodb/specifications/commit/735a667672c758617821e3c5dda99c551e007375 Note, as part of the above commit some existing tests around redacting sensitive commands/replies in command monitoring events and log messages were updated to have appropriate max server versions and so will now be skipped on newer servers where the commands they use no longer exist.