diff --git a/tox.ini b/tox.ini
index 843a9f6a..d7b3e898 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ commands =
     coverage report -m
 
 [testenv:debug]
-commands = oslo_debug_helper -t barbicanclient {posargs}
+commands = oslo_debug_helper -t barbicanclient/tests {posargs}
 
 [testenv:pep8]
 commands = {toxinidir}/tools/hacking.sh {posargs}