diff --git a/package.json b/package.json
index 4d2f39a8..c82543d6 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "start": "webpack-dev-server --config=config/webpack.dev.js",
     "weight": "npm run build-library > /dev/null && gzip-size built/webamp.bundle.min.js",
     "test": "jest --coverage",
-    "travis-tests": "jest --coverage && npm run build",
+    "travis-tests": "jest --coverage && npm run build && npm run build-library",
     "tdd": "jest --watch",
     "format": "prettier --write experiments/**/*.js js/**/*.js css/**/*.css",
     "build-skin": "rm skins/base-2.91.wsz && cd skins/base-2.91 && zip -x .* -x 'Skining Updates.txt' -r ../base-2.91.wsz .",