This topic has been explained many times in this forum. I won’t be worried about these tests at all and won’t rely on them at all. The tests that they do is that they take samples and test it with different antivirus and make a report of their findings. I have been using many paid/free antivirus in the past and I finally made a commitment to stay with Avast when they released version 7 and at present still using it. I have no regrets staying with avast, because they do an excellent job and the protection, services, and support they give to their customers is A+. The better news is that I haven’t been infected at all. I am and will be an Avast customer forever 
