diff --git a/.travis.yml b/.travis.yml
index e418357..66653e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,10 +6,12 @@ php:
   - 5.5
   - 5.6
   - hhvm
+  - nightly
 
 matrix:
   allow_failures:
     - php: hhvm
+    - php: nightly
 
 before_script:
   - bash tests/before_script.sh