tox: require newer virtualenv to avoid getting old pip

pitthsls · Sep 13, 2019 · 883ec67 · 883ec67
1 parent 04c4e82
commit 883ec67
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/tox.ini b/tox.ini
@@ -1,5 +1,6 @@
 [tox]
 envlist = py27,py35,py36,py37,pypy,pypy3,flake8,manifest,lint,docs,py38,versions
+requires = virtualenv >= 16.4.0
 
 [testenv]
 extras= tests