.travis.yml in mongoid-ids-0.1.1 vs .travis.yml in mongoid-ids-0.1.7

@@ -1,12 +1,18 @@
 language: ruby
 
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.0
   - 2.1.1
   - 2.2.0
+  - ruby-head
+  - jruby-19mode
+  - rbx-2
+
+matrix:
+  allow_failures:
+    - rvm: rbx-2
 
 gemfile:
   - Gemfile
 
 services: