diff --git a/.travis.yml b/.travis.yml
index 633169d8a..9476faff1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ rvm:
   - jruby-9.1.0.0
   - jruby-head
   - rbx-2
-  - rbx-3
+  - rbx
 before_install:
   - gem update bundler --no-document
 before_script:
@@ -22,8 +22,6 @@ matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
-    - rvm: rbx-2
-    - rvm: rbx-3
 notifications:
   email:
   - drbrain@segment7.net
diff --git a/test/helper.rb b/test/helper.rb
index 36ee9b050..f8f1fe106 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -1,5 +1,6 @@
 $:.unshift File.expand_path('../../lib', __FILE__)
 
+gem 'minitest', '~> 5'
 require 'minitest/autorun'
 require 'rake'
 require 'tmpdir'