diff --git a/.travis.yml b/.travis.yml
index d8223459f..76b041f70 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,7 +35,8 @@ install: gradle assemble --stacktrace
 # archive to additionaly test if artifact creation is
 # functional. Which hasn't always be the case in the past, see
 # 90cbcaebc7a89f4f771f733a33ac9f389df85be2
-script: gradle check install --stacktrace
+# Also run javadocAll to ensure it works.
+script: gradle check install javadocAll --stacktrace
 
 after_success:
   - JAVAC_VERSION=$((javac -version) 2>&1)