diff --git a/tox.ini b/tox.ini
index 1eacc4d..7e39692 100644
--- a/tox.ini
+++ b/tox.ini
@@ -46,7 +46,7 @@
 commands =
     # Install mailmanclient from local repo instead of from pypi
     pip install -e ../mailmanclient
-    example_project/manage.py test {posargs:postorius}
+    python example_project/manage.py test {posargs:postorius}
 
 [testenv:dev-record]
 usedevelop = True
@@ -60,7 +60,7 @@
 commands =
     # Install mailmanclient from local repo instead of from pypi
     pip install -e ../mailmanclient
-    example_project/manage.py test {posargs:postorius}
+    python example_project/manage.py test {posargs:postorius}
 
 [testenv:pep8]
 basepython = python2.7