diff --git a/.travis.yml b/.travis.yml
index 16fd3f1..6958887 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,5 +47,6 @@ matrix:
     - gemfile: gemfile/active_record_edge.gemfile
     - rvm: rbx-2
       gemfile: gemfiles/mongo_mapper.gemfile
+    - rvm: rbx-2
       gemfile: gemfiles/mongoid_24.gemfile
   fast_finish: true