From 96ad3f2275c6c991bb9532f67d74f903f6594a0f Mon Sep 17 00:00:00 2001
From: Brad Warren <bmw@eff.org>
Date: Mon, 1 Jul 2019 12:22:11 -0700
Subject: [PATCH] Pass -U to upgrade tox and deps.

---
 .travis.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index cf399bbd6..950b35591 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -268,9 +268,7 @@ addons:
 
 # tools/pip_install.py is used to pin packages to a known working version
 # except in tests where the environment variable CERTBOT_NO_PIN is set.
-# virtualenv is listed here explicitly to make sure it is upgraded when
-# CERTBOT_NO_PIN is set.
-install: "tools/pip_install.py codecov tox virtualenv"
+install: "tools/pip_install.py -U codecov tox"
 script: tox
 
 after_success: '[ "$TOXENV" == "py27-cover" ] && codecov -F linux'