speedtest-cli SSL: CERTIFICATE_VERIFY_FAILED

root@debian-buster-armhf:~# speedtest-cli
Retrieving speedtest.net configuration...
Cannot retrieve speedtest configuration
ERROR: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)>

W takim wypadku sprawdzamy czy mamy i jeśli nie instalujemy ca-certificates

aptitude install ca-certificates