diff --git a/tox.ini b/tox.ini
index b9b4794..dc5ac96 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,4 +21,4 @@ recreate=True
 commands=
     git submodule sync -q
     git submodule update --init
-    python -m tests
+    python -m tests {posargs}