diff --git a/requirements_dev.txt b/requirements.txt
similarity index 100%
rename from requirements_dev.txt
rename to requirements.txt
diff --git a/tox.ini b/tox.ini
index f65298a..dbe2ebc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,9 @@ setenv =
     PYTHONPATH = {toxinidir}
 deps =
     -r{toxinidir}/requirements.txt
+; If you want to make tox run the tests with the same versions, create a
+; requirements.txt with the pinned versions and uncomment the following line:
+;     -r{toxinidir}/requirements.txt
 commands =
     pip install -U pip
     pytest --basetemp={envtmpdir}