diff --git a/tests/ansible/hosts/localhost.hosts b/tests/ansible/hosts/localhost.hosts
index 89bf7b38..41af412e 100644
--- a/tests/ansible/hosts/localhost.hosts
+++ b/tests/ansible/hosts/localhost.hosts
@@ -1,9 +1,8 @@
 # vim: syntax=dosini
 
-# This must be defined explicitly, otherwise _create_implicit_localhost()
-# generates its own copy, which includes an ansible_python_interpreter that
-# varies according to host machine.
-localhost
+# issue #511, #536: we must not define an explicit localhost, as some
+# transport_config/python_path.yml needs to test the implicit localhost
+# behaviour.
 
 # This is only used for manual testing.
 [localhost-x10]