For the research, we made analysis is some random packages like: Aconcagua, VB-Regex, Network, Magritte and Pier.

Of course we found places to improve testing on all of these packages. We can continue analysing other places and work on improving testing.

However, a problem to solve is using MuTalk to run mutation testing on Collection (because MuTalk uses collections) or running mutation testing on MuTalk, I mean, its own model. That is because you are changing its own behaviour while it is running.

Eliminate the core classes for now. Stef