DRIVERS-2865 : Summary of necessary driver changes  Drivers will need to change handling of the bypassDocumentValidation to all write commands ( insert , update , findAndModify , aggregate with $out or $merge , as well as bulk writes. Note that the new client bulk write API does not need changing. Commits for syncing spec/prose tests (and/or refer to an existing language POC if needed)  A new test file testing the affected behaviour was added to the CRUD spec in commit b1b5a7f4209ba4a0fd3dca31a7b34378ac5ce6c1 . Context for other referenced/linked tickets  The original change to only send the flag if it was specified with a true value was made in DRIVERS-450 . This change brings handling of this option in line with all other options.