1 files changed, 4 insertions, 0 deletions
diff --git a/tox.ini b/tox.ini
index abd9602..397cbec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,8 +58,12 @@ commands =
     python igor.py test_with_tracer c {posargs}
 
 [testenv:py26]
+basepython = python2.6
 install_command = python -m pip.__main__ install -U {opts} {packages}
 
+[testenv:py33]
+basepython = python3.3
+
 [testenv:pypy]
 # The "pypy" environment is for Travis.  Probably can make Travis use one of
 # the other environments...