Simple as this:
$ wget -O speedtest-cli https://raw.github.com/sivel/speedte...eedtest_cli.py
$ chmod +x speedtest-cli
$ ./speedtest-cli

Mine were with Seedboxes.cc:

Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from i3d B.V. (********)...
Selecting best server based on latency...
Hosted by fdcservers.net (Amsterdam) [0.00 km]: 5.882 ms
Testing download speed........................................
Download: 1506.81 Mbit/s
Testing upload speed............................................. .....
Upload: 366.83 Mbit/s