Fibertest is a best way to do a constant internet speed test.
You can determine the approximate speed of your Internet connection by taking the speed test from Fibertest which will generate a result on your Internet download speed and upload speed.
Next, from the desktop, visit to Fibertest website and click on the start button to begin the internet speed test. Within seconds you will get your internet speed test results. Then you can determine how fast the internet you are getting for what you’re paying for.
Keep in mind, however, that your internet connection speed fluctuates all the time. So I recommend internet speed test running it a few times and check the average speed you receive is what your real internet speed is.