Mystery text in compiler

In a few different Python exercises, CC seems to be adding in text to the compiler that is not in my code.

For example in Practice Makes Perfect 8: anti_vowel, I get the following error

Your function fails on anti_vowel(“Hey look Words!”). It returns “None” when it should return “Hy lk Wrds!”.

I also get “Hy lk Wrds!” added on to the end of anything I compile.

I don’t have “Hey look Words!” in my input, and even when I do use that string, it doesn’t return “None”, it returns “Hy lk Wrds!” as it should. I also see random strings like ‘abc’ in the compiler.

The previous exercise called reverse had a similar issue, it’s a bit annoying as it doesn’t allow me to progress without clicking solution. I’ve tested the same code in IDLE and it compiles just fine.

the exercise validates your code by calling the function, known as test cases

your code should pass these test cases. The error is valid, given the instructions tell you to return the anti vowel string or the reversed string