diff --git a/tox.ini b/tox.ini
index 1774e91..b4e1713 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,7 @@ passenv =
     DB_*
 usedevelop = True
 commands =
-    pytest {posargs}
+    python -m pytest {posargs}
 
 [testenv:flake8]
 basepython =