diff --git a/.travis.yml b/.travis.yml
index 3a562dfd19360ce62320132eb6e04c4ef94f8376..2ffd177b2e18f79e44a69518d34f74f4f69cfd1d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,12 +14,20 @@ cache:
 
 matrix:
   include:
+    # PHPUnit
     - php: nightly
       env: WP_VERSION=latest
+    - php: nightly
+      env: WP_VERSION=trunk
     - php: 7.1
       env: WP_VERSION=latest
+    - php: 7.1
+      env: WP_VERSION=trunk
     - php: 7.0
       env: WP_VERSION=latest
+    - php: 7.0
+      env: WP_VERSION=trunk
+    # PHPCS
     - php: 7.1
       env: WP_TRAVISCI=phpcs