diff --git a/tox.ini b/tox.ini
index 723c71c..f82daaf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,7 @@ commands = flake8 kmip/
 [testenv:integration]
 # Note: This requires local or remote access to a KMIP appliance or service
 deps = {[testenv]deps}
+basepython=python2.7
 commands =
     py.test --strict kmip/tests/integration {posargs}