From 41d0152f2845088db4245489845d6b8bf0125bfa Mon Sep 17 00:00:00 2001
From: Tom Parker-Shemilt <palfrey@tevp.net>
Date: Sat, 14 Mar 2020 18:01:28 +0000
Subject: [PATCH] Go back to upgrading python...

---
 travis/macos-install.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/travis/macos-install.sh b/travis/macos-install.sh
index 51dd1ac..2da30ef 100755
--- a/travis/macos-install.sh
+++ b/travis/macos-install.sh
@@ -2,8 +2,9 @@
 
 set -ex
 
+export HOMEBREW_NO_INSTALL_CLEANUP=1
 brew update
-brew install python3
+brew upgrade python
 which python3
 python3 --version
 which pip3