diff --git a/tox.ini b/tox.ini
index 5b1e21f..ce3d330 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 commands =
-    coverage run --source=kmip/ --omit=kmip/demos/*,kmip/tests/* -m pytest --strict kmip/tests/unit
+    coverage run --source=kmip/ --omit=kmip/demos/*,kmip/tests/* -m pytest --strict kmip/tests/unit {posargs}
     coverage report -m
     coverage html