diff --git a/package.json b/package.json
index 886ebbc7..cae652ab 100644
--- a/package.json
+++ b/package.json
@@ -60,8 +60,10 @@
     "@babel/core": "^7.17.5",
     "@babel/preset-env": "^7.16.11",
     "@babel/preset-typescript": "^7.16.7",
+    "@types/chai": "^4.3.0",
     "@types/jquery": "^3.5.13",
     "@types/lodash": "^4.14.178",
+    "@types/mocha": "^9.1.0",
     "@types/node": "^17.0.18",
     "@types/react": "file:hwe/ts/@types/types__react",
     "@typescript-eslint/eslint-plugin": "^5.12.0",
@@ -72,6 +74,7 @@
     "babel-plugin-lodash": "^3.3.4",
     "babel-preset-modern-browsers": "^15.0.2",
     "bootswatch": "^5.1.3",
+    "chai": "^4.3.6",
     "clean-terminal-webpack-plugin": "^3.0.0",
     "css-loader": "^6.6.0",
     "cssnano": "^5.0.17",
@@ -80,6 +83,7 @@
     "eslint-plugin-vue": "^8.4.1",
     "file-loader": "^6.2.0",
     "mini-css-extract-plugin": "^2.5.3",
+    "mocha": "^9.2.1",
     "postcss-discard-duplicates": "^5.0.3",
     "postcss-import": "^14.0.2",
     "postcss-loader": "^6.2.1",