diff --git a/tox.ini b/tox.ini
index f790fa05..68d9bea8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,15 +25,15 @@ setenv = OS_TEST_PATH=./kuryr_libnetwork/tests/fullstack
 passenv = OS_*
 
 [testenv:debug]
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t kuryr_libnetwork/tests {posargs}
 
 [testenv:debug-py27]
 basepython = python2.7
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t kuryr_libnetwork/tests {posargs}
 
 [testenv:debug-py34]
 basepython = python3.4
-commands = oslo_debug_helper {posargs}
+commands = oslo_debug_helper -t kuryr_libnetwork/tests {posargs}
 
 [testenv:pep8]
 commands = flake8