.travis.yml in percheron-0.7.8 vs .travis.yml in percheron-0.7.9

@@ -1,6 +1,7 @@
 language: ruby
 before_install: gem install bundler --version 1.9.7
+gemfile: Gemfile.travis
 rvm:
   - 2.0
   - 2.1
   - 2.2
 branches: