diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
index 1b95873..8dab91a 100644
--- a/.github/workflows/pr-check.yml
+++ b/.github/workflows/pr-check.yml
@@ -77,3 +77,54 @@ jobs:
               exit 1
             fi
           fi
+
+  wasm-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: wasm32-unknown-unknown
+          override: true
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Install wasm-pack
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+      - name: Cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: Build WASM
+        working-directory: pubky/pkg
+        run: |
+          npm install
+          npm run build
+
+      - name: Run the testnet
+        working-directory: pubky/pkg
+        run: npm run testnet > testnet.log 2>&1 &
+
+      - name: Wait for testnet homeserver
+        run: |
+          until nc -zv 127.0.0.1 6286; do
+            echo "Waiting for testnet homeserver to be ready..."
+            sleep 1
+          done
+
+      - name: Run Tests (only node-js)
+        working-directory: pubky/pkg
+        # runing only `test-nodjs` and not browser because of weird `exit` behavior
+        run: npm run test-nodejs
+
+      - name: Show testnet logs if tests fail
+        working-directory: pubky/pkg
+        if: failure()
+        run: cat testnet.log
diff --git a/pubky/pkg/package.json b/pubky/pkg/package.json
index 6e035cb..4820b05 100644
--- a/pubky/pkg/package.json
+++ b/pubky/pkg/package.json
@@ -34,6 +34,7 @@
   ],
   "devDependencies": {
     "browser-resolve": "^2.0.0",
+    "browserify": "^17.0.1",
     "esmify": "^2.1.1",
     "tape": "^5.8.1",
     "tape-run": "^11.0.0"