Currently flutter --help drive mostly displays the generic flutter command options. It would useful to incorporate the information from the source file's doc: https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/commands/drive.dart#L23-L42

It would also be helpful to explain how the path provided to --target (or -t) relates to the driver test's path.