When i set my dns on my android device and go to dns leak test it's not the dns that I set in the dns settings. Its the dns set by my ISP.

How can I get it to use the dns that I want?

for reference:
how-to-change-dns-settings-on-android
my device is a lemaker guitar
I do not have root access on the device
I am accessing my wifi at home

http://xslab.com/2013/08/how-to-change-dns-settings-on-android/