Index: .travis.yml
===================================================================
--- .travis.yml	(revision 11633)
+++ .travis.yml	(working copy)
@@ -6,6 +6,8 @@
 
 language: php
 
+dist: trusty
+
 cache:
   apt: true
   directories:
@@ -19,6 +21,7 @@
   - 5.5
   - 5.4
   - 5.3
+    dist: precise
 
 # WordPress comes from the Git mirror, where 'master' mirrors svn 'trunk' and
 # x.y mirrors the latest from the x.y branch