diff --git a/.travis.yml b/.travis.yml
index 8e5f2fc..061851e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,11 +6,21 @@ php:
   - 5.5
   - 5.6
   - 7.0
+  - 7.1
+  - nightly
   - hhvm
+  - hhvm-nightly
 
 matrix:
-  allow_failures:
+  include:
+    - php: nightly
+      env: ALLOW_FAILURE=1
     - php: hhvm
+      env: ALLOW_FAILURE=1
+    - php: hhvm-nightly
+      env: ALLOW_FAILURE=1
+  allow_failures:
+    - env: ALLOW_FAILURE=1
 
 install:
   - composer install