@@ -1,11 +1,13 @@
 [tox]
 skipsdist = true
-envlist = py26,py27,py33,py34,py35,lint
+envlist = py{26,27,33,34,35},py{26,27,33,34,35}-oldest,lint
 
 [testenv]
 commands =
   pip install -e .
   simp_le --test
+deps =
+  py{26,27,33,34,35}-oldest: acme==0.3.0
 
 [testenv:lint]
 basepython=python2.7