I'm renaming the "tests" directory in order to make a clear difference between non-regression and acceptance tests.
Renaming "tests" to "non_regression_tests"
Please add "REFACTORING: " prefix to your commit message.
Feel free to use git commit --amend in order to do it.
git commit --amend
Without any changes for several weeks in your pull request, I have to reject it. Feel free to edit your commit message and do a pull request later.