diff --git a/tox.ini b/tox.ini
index e83ca274f..3933f49d5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -90,7 +90,7 @@ commands = pip uninstall --yes msgpack
 deps = {[testenv]deps}
        pytest-randomly
        jsonschema
-commands = pytest {posargs}
+commands = pytest tests []
 
 # --------------------------------------------------------------------
 # Additional test suite environments