@mdboom - the reason this chunk of code is not getting executed is because ``d.lines`` is empty until ``cov._harvest_data()`` is called (which calling ``save`` does). So we need to force the data to be harvested before we can adjust the file paths. If you add ``cov._harvest_data()`` on line 252 then it works, with the exception that ``testing_path`` is undefined, but that should be an easy fix.