What does “The following object is masked from 'package:xxx'” mean?

Question

When I load a package, I get a message stating that:

\"The following object is masked from \'package:xxx\'

For example, if I load testthat

Answer 1

I have the same problem. I avoid it with remove.packages("Package making this confusion") and it works. In my case, I don't need the second package, so that is not a very good idea.