Try installing pg 9.6.2 manually

.travis.yml

@@ -3,13 +3,20 @@ language: python
 git:
   depth: 5
 addons:
-  postgresql: 9.5
+  postgresql: 9.6
   firefox: latest-esr
 before_install:
  - git branch -vv | grep '^*'
  - pwd
  - find . -name "*.sh" -exec bash -n {} \;
 
+ # Temporarily install 9.6.2 manually, remove once 9.6.2 is default on Travis
+
+ - sudo add-apt-repository "deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main"
+ - wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+ - sudo apt-get update
+ - sudo apt-get install postgresql-9.6
+
  # Sometimes ya just halfta ...
  - git clone -b "2.1.0" --depth 1 https://github.com/lloyd/yajl.git && cd yajl && ./configure && sudo make install && cd ..