uri: "mongodb+srv://test18.test.build.10gen.cc/?replicaSet=repl0" seeds: - localhost.sub.test.build.10gen.cc:27017 hosts: - localhost:27017 - localhost:27018 - localhost:27019 options: replicaSet: repl0 ssl: true ping: true comment: Is correct, as returned host name shared the URI root "test.build.10gen.cc".