diff --git a/tox.ini b/tox.ini
index fc032ff948..ee6eda7a29 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ commands =
   python setup.py test --slowest --testr-args='{posargs}'
 
 [testenv:debug]
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t kolla/tests {posargs}
 
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}