diff --git a/.travis.yml b/.travis.yml
index e7fcc3167ea..2f976c906b5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ cache:
   bundler: true
   directories:
     - node_modules
+    - test/node_modules
 # Tell Travis to build gh-pages branch
 # https://docs.travis-ci.com/user/customizing-the-build#Safelisting-or-blocklisting-branches
 branches: