How do you know it's an evap line?

Question

Ok so I've taken numerous test and every single time I look at them a few hours later they turn positive. I figured they were evap lines this one looks different. How do you know it's an evap line?

Answer

Blue tests are notorious for evap lines. I would go get a pink dye test and confirm with that.

Answer

It looks positive to me. But I've been dealing with what I think is evap too on the first signal test. 4 of them and all 4 have evap lines 😔😔