diff --git a/codecov.yml b/.codecov.yml
similarity index 100%
rename from codecov.yml
rename to .codecov.yml
diff --git a/README.rst b/README.rst
index 2861f44a0..983f50fbe 100644
--- a/README.rst
+++ b/README.rst
@@ -106,6 +106,9 @@ The following tox environments are relevant for local testing:
     tox -e docs  # runs a does-it-compile check on the documentation
     tox -e lint  # runs the linter for coding style checks
 
+We are in the middle of transitioning to Python 3, so please make sure all tests
+pass in Python 2.7 and 3.5. Running `tox` ensure all necessary tests are executed.
+
 
 Documentation
 -------------