diff --git a/tox.ini b/tox.ini
index dbd0526b..c16664d8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,7 @@ commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:debug]
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t neutron_tempest_plugin/ {posargs}
 
 [flake8]
 # E125 continuation line does not distinguish itself from next logical line