diff --git a/.travis.yml b/.travis.yml
index efb5b29..920958d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,10 +4,13 @@ php:
   - 5.6
   - 7.0
   - hhvm
+  - nightly
 
 matrix:
   allow_failures:
-    - php: hhvm
+    - php:
+        - hhvm
+        - nightly
 
 cache:
   directories: