1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 884b78c68..251e43406 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ envlist =
     py27,py34,py35,py36,py37,pypy,
     docs,pep8,
     {py2,py3}-cover,coverage,
-skip-missing-interpreters = True
+skip_missing_interpreters = True
 
 [testenv]
 # Most of these are defaults but if you specify any you can't fall back