I took a test yesterday. You can very clearly see the dark blue "control" line, but what you may or may not be able to see is the very faint blue line to the right. Before we all get our panties in a wad though, I have to confess that I didn't look at the test until well after 10 minutes. I got busy. I do have three children you know! The test instructions state (in bold letters) that you absolutely should not read the test results after 10 minutes. It doesn't say why, though. Is it because the blue line might fade, leaving you to think you're not pregnant when you actually are? Or, is it because when the test strip dries, it reveals the faint blue line, leaving you to think you're pregnant when you're not?