diff --git a/test-requirements.txt b/test-requirements.txt
index 28a0fd0..054ff53 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,3 +10,4 @@ testtools>=0.9.34
 oslosphinx
 MySQL-python
 psycopg2
+os-testr
diff --git a/tox.ini b/tox.ini
index bcf3cb6..6ace379 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
-    python setup.py test --slowest --testr-args='{posargs}'
+    ostestr {posargs}
 
 [testenv:pep8]
 sitepackages = False