diff --git a/.travis.yml b/.travis.yml
index 86f3ad632..a8fe3b964 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,3 +8,8 @@ rvm:
   - ree
   - rbx-18mode
   - rbx-19mode
+matrix:
+  allow_failures:
+    - rvm: rbx-18mode
+    - rvm: rbx-19mode
+