diff --git a/.travis.yml b/.travis.yml
index 74cd837b08e..b1e0cb793eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,9 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
   - hhvm
+  - hhvm-nightly
 
 env:
   - DB=mysql
@@ -32,3 +34,7 @@ matrix:
       env: DB=pgsql  # driver currently unsupported by HHVM
     - php: hhvm
       env: DB=mysqli # driver currently unsupported by HHVM
+    - php: hhvm-nightly
+      env: DB=pgsql  # driver currently unsupported by HHVM
+    - php: hhvm-nightly
+      env: DB=mysqli # driver currently unsupported by HHVM