The test was flawed according to makers of uBlock Origin and AdGuard.
I don't know of anything has changed with the new test.
There is a FAQ and a Compatibility Check on the main page:
Looking for an easy way to check the efficiency of your ad blocker?Toolz offers a simple and beautiful design test that allows you to quickly and easily test the performance of current ad/content blocker solution. Intuitive interface makes it easy to navigate and use, and the beautiful design...
d3ward.github.io
Adding his filter in uBlock Origin gives me 100%, but adding his filter in AdGuard for Android only gives 77%.