The /versioned_api/transaction-handling JSON spec test currently fails and/or is flaky. Specifically, the "All commands in a transaction declare an API version" sub-test is the one that fails.

It fails with this message:

API parameters are only allowed in the first command of a multi-document transaction

The test is currently being skipped, so to work on it, it will first be necessary to remove it from .evergreen/skip-tests.txt and run a patch build to determine the current failure mode(s).