.travis.yml in rib-1.3.1 vs .travis.yml in rib-1.4.0

@@ -10,5 +10,9 @@
   - rvm get head
   - rvm reload
   - rvm use --install $TRAVIS_RUBY_VERSION --binary --latest
 install: 'gem install bundler; bundle install --retry=3'
 script: 'ruby -r bundler/setup -S rake test'
+
+matrix:
+  allow_failures:
+  - rvm: rbx