In the speedtest page, all commands are not working (except for the first one with no CLI arguments: speedtest). I'm running the speedtest-cli 2.1.3 (it's the latest version) - it's possible these CLI arguments worked in an earlier version.

All these commands are not working (in each case error unrecognized arguments is shown):

• speedtest --unit=auto-decimal-bits|auto-decimal-bytes|auto-binary-bits|auto-binary-bytes
• speedtest --format=human-readable|csv|tsv|json|jsonl|json-pretty
• speedtest --precision=precision
• speedtest --progress=yes|no
• speedtest --servers
• speedtest --server-id=server_id

Available options are listed in speedtest's github repository: https://github.com/sivel/speedtest-cli - there also the above mentioned CLI arguments are not mentioned. Note that a flag similar to last one listed (-server-id) exists, so it might have been renamed at some point: --server SERVER.