diff --git a/HACKING.rst b/HACKING.rst
index 701e431a259..765f8a8ce6d 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -48,9 +48,6 @@ bug that had no unit test, a new passing unit test should be added. If a
 submitted bug fix does have a unit test, be sure to add a new one that fails
 without the patch and passes with the patch.
 
-Cinder is transitioning to use mock, rather than mox, and so new tests should
-use mock only.
-
 For more information on creating unit tests and utilizing the testing
 infrastructure in OpenStack Cinder, please see
 https://docs.openstack.org/cinder/latest/contributor/testing.html