That didn't work. Have removed hhvm test.

Chris Botman · Chris Botman · commit f1315f64e501 · 2017-06-07T15:32:09.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,13 +1,12 @@
 language: php
-dist: trusty
+
 php:
   - '5.3'
   - '5.4'
   - '5.5'
   - '5.6'
   - '7.0'
   - '7.1'
-  - hhvm
 
 before_script:
   - composer install -n --dev --prefer-source
