diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 405020e..03401e8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,11 +8,50 @@ defaults:
     shell: bash
 
 jobs:
+  # Test the package
+  test:
+    # Setup
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node-version: [ 18.x, 20.x ]
+        os: [ windows-latest, ubuntu-latest, macOS-latest ]
+
+    # Go
+    steps:
+
+    - name: Check out repo
+      uses: actions/checkout@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        registry-url: https://registry.npmjs.org/
+
+    - name: Env
+      run: |
+        echo "Event name: ${{ github.event_name }}"
+        echo "Git ref:    ${{ github.ref }}"
+        echo "GH actor:   ${{ github.actor }}"
+        echo "SHA:        ${{ github.sha }}"
+        VER=`node --version`; echo "Node ver:   $VER"
+        VER=`npm --version`; echo "npm ver:    $VER"
+
+    - name: Install
+      run: npm install
+
+    - name: Test
+      run: npm test
+      env:
+        CI: true
+
   # ----- Only git tag testing + package publishing beyond this point ----- #
 
   # Publish to package registries
   publish:
     # Setup
+    needs: test
     if: startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest