The last test i definitely see a line, so they seem to be getting darker to me as most of the others i wasnt sure if i could see a line or not. Also, just thought id add, a lady on here rang First Response when she was getting lots of faint lines, and they told her that the tests can pick up as low as 5 miu. Not sure how helpful that is, but thought id share the info!!! good luck, cant wait to see ur next test!!! xx