1 files changed, 2 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index ffa62a39..7de764f7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,7 @@
 [tox]
 minversion = 2.4
-envlist = py27,pypy,py34,py35,py36,py37,docs,pep8,packaging
+envlist = py27,pypy,py34,py35,py36,py37,py38,docs,pep8,packaging
+isolated_build = True
 
 [testenv]
 extras =