diff --git a/package.json b/package.json
index 2fed94a8..d592cac4 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "lint": "eslint src/htmx.js test/attributes/ test/core/ test/util/",
     "lint-fix": "eslint src/htmx.js test/attributes/ test/core/ test/util/ --fix",
     "format": "eslint --fix src/htmx.js test/attributes/ test/core/ test/util/",
-    "test": "npm run lint && mocha-chrome test/index.html",
+    "test": "npm run lint && tsc --project ./jsconfig.json --noEmit true --emitDeclarationOnly false && mocha-chrome test/index.html",
     "type-declarations": "tsc --project ./jsconfig.json",
     "ws-tests": "cd ./test/ws-sse && node ./server.js",
     "www": "bash ./scripts/www.sh"