Fixed test failure on Python 3.4

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 54ee508..16bc5b7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ envlist = py27, py34, py35, py36, py37, pypy, pypy3, flake8
 skip_missing_interpreters = true
 
 [testenv]
-pip_version = pip>=19.3
+pip_version = {py35,p36,py37}: pip>=19.3
 commands = pytest {posargs}
 extras = testing
     asyncio