Yesterday I refactored my project and I changed layout of my packages (I moved some packages into another packages, created new packages etc). But now, when I try to run JUnit test I get
I have two suggestions you could try here
With regards to your edit - I've not seen this myself. Whenever I've renamed or moved files (including packages) these changes have been correctly applied to all applicable files. Are you refactoring with Refactor>Move / Refactor->Copy ?