[Beta] All the tests always pass (bug?)

After finishing the front end certification I went to the beta version to learn the added things like the ES6 part. I thought I was getting really good, but noticed alfway through that no matter what I write, as long as the code doesn’t return an error, all the tests will pass.

I think I understood well what I did so far, but I can’t know if I made mistakes or not… Am I the only one with this problem?

It is a known bug that has been reported for many of the challenges. They are working on it.