diff --git a/tox.ini b/tox.ini
index 044fb4471..3f0a0f3ec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,24 +26,24 @@ commands = python setup.py build_sphinx
 
 [testenv:py27-func-rabbit]
 setenv = TRANSPORT_DRIVER=rabbit
-commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='oslo_messaging.tests.functional'
+commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py34-func-rabbit]
 setenv = TRANSPORT_DRIVER=rabbit
 basepython = python3.4
-commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='oslo_messaging.tests.functional'
+commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py27-func-pika]
 setenv = TRANSPORT_DRIVER=pika
-commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='oslo_messaging.tests.functional'
+commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py27-func-amqp1]
 setenv = TRANSPORT_URL=amqp://stackqpid:secretqpid@127.0.0.1:65123//
 # NOTE(flaper87): This gate job run on fedora21 for now.
-commands = {toxinidir}/setup-test-env-qpid.sh 1.0 python setup.py testr --slowest --testr-args='oslo_messaging.tests.functional'
+commands = {toxinidir}/setup-test-env-qpid.sh 1.0 python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py27-func-zeromq]
-commands = {toxinidir}/setup-test-env-zmq.sh python setup.py testr --slowest --testr-args='oslo_messaging.tests.functional'
+commands = {toxinidir}/setup-test-env-zmq.sh python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:bandit]
 deps = -r{toxinidir}/test-requirements.txt