.travis.yml in trailblazer-rails-2.1.5 vs .travis.yml in trailblazer-rails-2.1.6

@@ -2,10 +2,13 @@
 language: ruby
 cache: bundler
 matrix:
   include:
   - rvm: 2.4.1
+    env: TEST_SUITE=rails4.2
+    gemfile: test/rails4.2/Gemfile
+  - rvm: 2.4.1
     env: TEST_SUITE=rails5.0
     gemfile: test/rails5.0/Gemfile
 
   - rvm: 2.4.1
     env: TEST_SUITE=rails5.1
@@ -13,6 +16,7 @@
 
   - rvm: 2.5.1
     env: TEST_SUITE=rails5.2
     gemfile: test/rails5.2/Gemfile
 
-script: cd test/$TEST_SUITE && bundle install && bundle exec rake test
+script: cd test/$TEST_SUITE && bundle install && bundle exec rake test && cd ../.. && bundle install && bundle exec rake rubocop
+