Assignment 3 - Tests 11-13 Not Passing Studentgrade

I’m feeling pretty confident in my code and it’s passing all of my tests but not passing the last three tests when it comes to the studentgrade.spec. I’m not getting any details on why it’s not passing. Does anyone have any suggestions? It’s just giving me the line 17 error and nothing else and I’ve been working on it for quite a few days now.

I had a similar problem. Here’s a thread about it.