diff --git a/.travis.yml b/.travis.yml
index aa1af3e6..6711c8a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,11 @@ cache:
 php:
     - 7.1
 
+matrix:
+  include:
+    - dist: xenial
+    - dist: trusty
+
 env:
     - TEST_SUITE="0-*"
     - TEST_SUITE="1-*"