I did this, it took more effort than I wanted but well...
- set paths for tests as relative to the root folder of the project under test
- suppress mocha output
- got the original source code (even though in an horrible way waiting for a refactor), so it could be compared with the mutated source code
So I still have to
- format the code in a nice way so it's easily readable (right now it's all on one line)
- produce a diff between non-mutated source and mutated-source