what is the best way to test the internet speed

https://www.speedtest.net/

https://testvitesse.videotron.ca/index-en.html
Videotron speed test works pretty good as well. In any case, don't use the one Google has.

Videotron speed test give a speed of 20 instead of 120

Fast.com (by Netflix) is also a good alternative.

If those suggestions don't work most major internet providers provide their own speedtest. I've used Bell, Telus and Rogers all in the past.

You can download the app and it will give you a very good test, or you can try
https://www.speedtest.net
https://www.fast.com

In order to get the best results, you will need to be hardwired to the modem and run the test with no other devices connected(disable the wifi on the modem).

Close all running programs and run the speed test from your preferred browser.

Most accurate web site is speedtest.net, powered by Oookla, but make sure you select a test server that has lots of ressources (Bell, Telus, Rogers, Techsavy, FibreNoir, ect..).

Hope it helps!

Use fast.com, very straight forward and easy to use.