diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
new file mode 100644
index 0000000..e84f838
--- /dev/null
+++ b/.github/workflows/coverage.yml
@@ -0,0 +1,28 @@
+name: coverage
+
+on:
+  push:
+    paths-ignore:
+      - '*.md'
+  pull_request:
+
+env:
+  CI: true
+  NODE_ENV: cov
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v4
+      - run: npm install
+      - name: run coverage
+        run: npx -y nyc npm test
+        #run: npx -y c8 --reporter=lcov npm test
+      - name: codecov
+        uses: codecov/codecov-action@v3
+      # - name: Coveralls
+      #   uses: coverallsapp/github-action@master
+      #   with:
+      #     github-token: ${{ secrets.github_token }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c699a30..e26c834 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,17 +10,34 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    needs: [ get-lts ]
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+        node:
+          - ${{ fromJson(needs.get-lts.outputs.active) }}
+          - 21
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version-file: '.nvmrc'
+          node-version: ${{ matrix.node }}
       - name: Install dependencies
         run: npm install
       - name: Build
         run: npm run build
       - name: Test
         run: npm test
+
+  get-lts:
+    runs-on: ubuntu-latest
+    steps:
+      - id: get
+        uses: msimerson/node-lts-versions@v1
+    outputs:
+      lts: ${{ steps.get.outputs.lts }}
+      active: ${{ steps.get.outputs.active }}
diff --git a/.gitignore b/.gitignore
index a67db4a..02c60a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@ punycode.es6.js
 
 # Coverage report
 coverage
+.nyc_output
 
 # Installed npm modules
 node_modules
diff --git a/.nvmrc b/.nvmrc
deleted file mode 100644
index 209e3ef..0000000
--- a/.nvmrc
+++ /dev/null
@@ -1 +0,0 @@
-20
diff --git a/package.json b/package.json
index b8b76fc..5f6eceb 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "punycode.es6.js"
   ],
   "scripts": {
-    "test": "mocha tests",
+    "test": "npx mocha tests",
     "build": "node scripts/prepublish.js"
   },
   "devDependencies": {