diff --git a/.eslintrc.json b/.eslintrc.json
index 8583d020fa..b15c9c2cf8 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -5,7 +5,7 @@
     "node": true
   },
   "parserOptions": {
-    "ecmaVersion": 2019,
+    "ecmaVersion": 2020,
     "sourceType": "module"
   },
   "extends": "eslint:recommended",
diff --git a/package.json b/package.json
index 3338d22345..853e7ec86b 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "release-version": "node build/bump-version.js",
     "netlify": "cross-env-shell HUGO_BASEURL=$DEPLOY_PRIME_URL npm-run-all icons docs-build",
     "test:fusv": "fusv docs/assets/scss/",
-    "test:eslint": "eslint --cache --cache-location .cache/.eslintcache --report-unused-disable-directives .",
+    "test:eslint": "eslint --cache --cache-location .cache/.eslintcache --report-unused-disable-directives --ext .js,.mjs .",
     "test:stylelint": "stylelint docs/assets/scss/ --cache --cache-location .cache/.stylelintcache",
     "test:lockfile-lint": "lockfile-lint --allowed-hosts npm --allowed-schemes https: --empty-hostname false --type npm --path package-lock.json",
     "test:check-icons": "node build/check-icons.mjs",