diff --git a/.travis.yml b/.travis.yml
index 5ea5ad8..d3c7b45 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,3 +6,7 @@ php:
   - 5.5
   - 5.6
   - hhvm
+
+matrix:
+  allow_failures:
+    php: hhvm # See https://github.com/facebook/hhvm/pull/1860
\ No newline at end of file