/testfor [score=] bug

I don't know if this is another bug, but if you run:

/testfor @p[score_Test=score_Info]

it works, but if you use:

/testfor @p[score_Test_min=score_Info]

or

/testfor @p[score_Test=score_Info_min]

You get an error message, that the provided UUID of the entity has an invalid format.

For every one who says now, I don't know how to use the scoreboard, THIS IS A LIE!

But if this command, like I wrote it, isn't intended, you should also get a error message when you just run:

/testfor @p[score_Test=score_Info]

But you don't.