From 4db3e19312483351d545f64bcb45fdcda278490c Mon Sep 17 00:00:00 2001
From: John Kirkham <kirkhamj@janelia.hhmi.org>
Date: Fri, 5 Feb 2016 14:44:54 -0500
Subject: [PATCH] TST: Pin virtualenv used on Travis CI. [skip appveyor]

---
 .travis.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index ccb182816e99..540d05c56f96 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -77,6 +77,10 @@ before_install:
   - pushd builds
   # Build into own virtualenv
   # We therefore control our own environment, avoid travis' numpy
+  #
+  # Some change in virtualenv 14.0.5 caused `test_f2py` to fail. So, we have
+  # pinned `virtualenv` to the last known working version to avoid this failure.
+  - pip install -U 'virtualenv==14.0.4'
   - virtualenv --python=python venv
   - source venv/bin/activate
   - python -V