diff --git a/tox.ini b/tox.ini
index f6a75302757f..d7509c64c7c4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -46,7 +46,6 @@ commands =
 setenv = {[testenv]setenv}
 commands =
   find . -type f -name "*.pyc" -delete
-  python -m subunit.run discover -t . ./nova/tests/ --list
   ostestr --blacklist_file tests-py3.txt
 
 [testenv:py34-constraints]