I did not find this test 'reliable' at all!!
here is a better and faster site that I state is more efficient.
http://www.chessmaniac.com/ELORating/ELO_Chess_Rating.shtml
best of luck.
I did the test in the site above today and the result is:
Your estimated Elo rating is 1490.
Now I made the statistic below, according to the tests and rating in chess sites.
I think I am improving a little bit.

I did not find this test 'reliable' at all!!
here is a better and faster site that I state is more efficient.
http://www.chessmaniac.com/ELORating/ELO_Chess_Rating.shtml
best of luck.