What does the inside strip of a clear blue digital pregnancy test look like when it's positive?

The digital pregnancy tests are the same set up as the basic tests. You will urinate on the test (or dip it in your fresh urine) and it will say positive or negative, but if you were to take the test apart the inside has the strip that will show with the one (if negative) or two (if positive) lines. From my experience, sometimes the test will display a negative reading but the strip will be positive with a faint line so always double test a few days later.