diff --git a/tox.ini b/tox.ini
index e4ed45c..d563a7d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,6 +25,6 @@ usedevelop = True
 commands =
     pytest
     prospector
-    py{36,37}: mypy axes
+    mypy axes
 setenv =
     PYTHONDONTWRITEBYTECODE=1