@Elshu
Isn’t a line a line ?
A line is a line in the sense of it doesn't matter if it's a faint line or a really strong line, it's usually still a positive. But sometimes tests can be invalid where the line is in the wrong place and it could be from the dye soaking through or a colour run (just as examples) or evaporation lines (although these usually don't have colour) in which case it would be a "false positive".
I'm not saying that's the case with yours as it is hard to see in the photo but to me it looks as if the line isn't in the right place and a colour run rather than a positive line.
Test again in the morning with FMU (first morning urine) if you can. I always found with the strip tests it was easier to pee in to a cup or something and dip the test in rather than pee directly on to the test