.travis.yml in fluent-plugin-mongo-0.7.13 vs .travis.yml in fluent-plugin-mongo-0.7.14

@@ -1,17 +1,28 @@
 rvm:
  - 1.9.3
  - 2.0.0
  - 2.1
- - 2.2
- - rbx
+ - 2.2.4
+ - 2.3.1
+ - ruby-head
 
+gemfile:
+ - Gemfile
+ - Gemfile.v0.12
+
 before_install:
   - gem update bundler
 before_script:
   - git submodule update -i
 
 script: mongod=mongod bundle exec rake test
 
 matrix:
   allow_failures:
-    - rvm: rbx
+    - rvm: 1.9.3
+    - rvm: ruby-head
+  exclude:
+    - rvm: 1.9.3
+      gemfile: Gemfile
+    - rvm: 2.0.0
+      gemfile: Gemfile