diff --git a/tox.ini b/tox.ini
index 32ee0116d..718778214 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,36}-cov, htmlcov
+envlist = py{27,37}-cov, htmlcov
 
 [testenv]
 deps =
@@ -17,7 +17,6 @@ commands =
     nocov: pytest {posargs}
 
 [testenv:htmlcov]
-basepython = python3.6
 deps =
     coverage
 skip_install = true