diff --git a/core/package.json b/core/package.json
index 1b9126c416..aa5c314777 100644
--- a/core/package.json
+++ b/core/package.json
@@ -71,7 +71,7 @@
     "theme-builder:dev": "sd concurrent \"npm run theme-app-build -- --watch\" \"stencil build --dev --watch\" \"stencil-dev-server\" \"npm run theme-server\" ",
     "theme-server": "node scripts/theme-builder/server.js",
     "tsc": "./node_modules/.bin/tsc -p .",
-    "validate": "npm run lint && npm run test && npm run build"
+    "validate": "npm run lint && npm run test && npm run build --max-workers 1 --debug"
   },
   "author": "Ionic Team",
   "license": "MIT",