A line??

I definitely see a line. Blue dye is very susceptible to evaporation lines, so depending on how long the test sat that could be a possibility. Test with pink dye ASAP.  😄 Good luck! I hope you get the results you want.

Have you tested again?! 

I took that same type of test and it did the same thing but when I woke up the next morning it showed completely negative. So just wait .

Ignore my other comment. Haha but I see it. It could allso be evap, especially if your other two were negative. How long did this one take to show up?

I would retest with a pink dye test in a few days 

I see a line

I don't see another line