.travis.yml in mongoid-locker-0.1.1 vs .travis.yml in mongoid-locker-0.2.0

@@ -5,5 +5,19 @@
   - 1.9.3
   - jruby-18mode # JRuby in 1.8 mode
   - jruby-19mode # JRuby in 1.9 mode
   - rbx-18mode
   - rbx-19mode
+gemfile:
+  - gemfiles/mongoid2.gemfile
+  - gemfiles/mongoid3.gemfile
+matrix:
+  exclude:
+    # not supported by Mongoid 3
+    - rvm: 1.8.7
+      gemfile: gemfiles/mongoid3.gemfile
+    - rvm: 1.9.2
+      gemfile: gemfiles/mongoid3.gemfile
+    - rvm: jruby-18mode
+      gemfile: gemfiles/mongoid3.gemfile
+    - rvm: rbx-18mode
+      gemfile: gemfiles/mongoid3.gemfile