data: - {_id: 1, x: 11} - {_id: 2, x: 'ping'} - {_id: 3, x: 'pINg'} minServerVersion: '3.4' tests: - description: "FindOneAndDelete when one document matches with collation" operation: name: findOneAndDelete arguments: filter: {_id: 2, x: 'PING'} projection: {x: 1, _id: 0} sort: {x: 1} collation: { locale: 'en_US', strength: 2 } # https://docs.mongodb.com/master/reference/collation/#collation-document outcome: result: {x: 'ping'} collection: data: - {_id: 1, x: 11} - {_id: 3, x: 'pINg'}