diff --git a/tox.ini b/tox.ini
index df612d7e..2bbf79f5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,14 +18,6 @@ skip_missing_interpreters = {env:TOX_SKIP_MISSING_INTERPRETERS:True}
 
 # Default test environment
 [testenv]
-basepython =
-    py27: python2.7
-    py34: python3.4
-    py35: python3.5
-    py36: python3.6
-    py37: python3.7
-    pypy3: pypy3
-
 setenv =
     MPLBACKEND = Agg