diff --git a/tox.ini b/tox.ini
index b15cca0eb47..88f6412dee3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -68,6 +68,7 @@ commands =
   {toxinidir}/tools/ostestr_compat_shim.sh {posargs}
 
 [testenv:dsvm-fullstack]
+basepython = python2.7
 setenv = {[testenv]setenv}
          {[testenv:common]setenv}
          {[testenv:dsvm]setenv}