It's more than likely an evap line, wait a day or two and take another one!
My test have always been accurate right away. They say don’t go off a test read hours later.
Most tests have a 5-10 minute validation window. Test again to be sure
Evap line shouldn't check it longer than half an hour later
I don't know what time it is where you are but if it's hours later it's likely an evaporation line and that's a false positive/invalid result