diff --git a/.travis.yml b/.travis.yml
index 3ccdc03..f1f4ec8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,3 +8,10 @@ rvm:
   - 1.9.2
   - 1.9.3
   - ruby-head
+
+matrx:
+  allow_failures:
+    rvm:
+      - rbx-18mode
+      - 1.8.7
+      - 1.9.2