I'm pretty sure that when using an IN clause in the tester, a comma separated list of values could be used as long as there were no spaces, there was no need for additional quotes.
However, it looks like there is an issue with the tester - if i send a list with no quotes, everything passes!
If the quotes are required due to the presence of the hyphen, then surely the middle option should fail everything rather than pass everything?
FME 2019.1.0.0 (Build 19608 WIN32)