diff --git a/tox.ini b/tox.ini
index 2f5b2f6..aacefbe 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,6 @@ usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
 install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
-commands = python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:venv]
 commands = {posargs}