diff --git a/.travis.yml b/.travis.yml
index 3cbeb5e80c09..27f5b6874bd7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,6 @@ env:
   - TEST_COMMAND='mx/mx checkoverlap'
   - TEST_COMMAND='mx/mx canonicalizeprojects'
   - TEST_COMMAND='mx/mx checkstyle'
-  
+  - TEST_COMMAND='mx/mx javadoc --unified'