There is other report that speedtest-cli is not good
Speedtest++ is recommended.
I tried that, it connects to Poland servers (why?) but measured values are not bed, the speed is higher than measured by Ookla speedtest… Speedtest++ measurement takes time, it is noticeably longer than speedtest-cli or Ookla speedtest 
ubuntu@budgie:~/SpeedTest$ ./SpeedTest
SpeedTest++ version 1.14
Speedtest.net command line interface
Info: https://github.com/taganaka/SpeedTest
Author: Francesco Laurita <francesco.laurita@gmail.com>
IP: xx.xx.xx.xx ( T-Mobile xxxxxx ) Location: [xx.xxxxx xx.xxxx]
Finding fastest server... 10 Servers online
........*.
Server: Warsaw war-o1.speedtest.orange.pl:8080 by Orange Polska S.A. (510.463 km from you): 26 ms
Ping: 26 ms.
Jitter: 0 ms.
Determine line type (2) ........................
Broadband line type detected: profile selected broadband
Testing download speed (32) ........................................................................................................
Download: 61.39 Mbit/s
Testing upload speed (8) .........................
Upload: 10.54 Mbit/s