diff --git a/.travis.yml b/.travis.yml
index 11ca4342..56bc8c1f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,11 +6,11 @@ rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - rbx-18mode
   - rbx-19mode
 matrix:
   allow_failures:
-    - rvm: rbx-19mode
+    # No mutators for 1.8 specifc AST nodes
+    - rvm: rbx-18mode  
     - rvm: 1.8.7
 notifications:
   email: