.travis.yml in pg_ha_migrations-1.1.0 vs .travis.yml in pg_ha_migrations-1.2.0

@@ -7,5 +7,10 @@
 addons:
   postgresql: "9.6"
 before_install:
   - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
   - gem install bundler -v 1.15.4
+gemfile:
+  - gemfiles/rails_5.0.gemfile
+  - gemfiles/rails_5.1.gemfile
+  - gemfiles/rails_5.2.gemfile
+script: "bundle exec rake spec"