diff --git a/.dockerignore b/.dockerignore
index 880c21fe3..f2099e1fc 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,7 @@
 data
 Dockerfile
 docker-compose.yml
+.dockerignore
 .git
-.gitignore
\ No newline at end of file
+.gitignore
+node_modules
diff --git a/.travis.yml b/.travis.yml
index d77e49fa1..047f0502e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,3 +9,4 @@ node_js:
 script:
   - npm run-script lint
   - npm run-script flow
+  - docker build -t xwiki/cryptpad .