diff --git a/elemes.sh b/elemes.sh
index f5640b1..8a8b45e 100755
--- a/elemes.sh
+++ b/elemes.sh
@@ -633,6 +633,15 @@ velxio-status)
     fi
   fi
   ;;
+velxio-test)
+  echo "🧪 Menjalankan test suite modul Velxio (Frontend Vitest)..."
+  if [ -d "$SCRIPT_DIR/velxio/frontend" ]; then
+    (cd "$SCRIPT_DIR/velxio/frontend" && npx vitest run "${@:2}")
+  else
+    echo "❌ Direktori velxio/frontend tidak ditemukan."
+    exit 1
+  fi
+  ;;
 *)
   echo "💡 Cara Penggunaan elemes.sh:"
   echo "  ./elemes.sh init           # Inisialisasi konfigurasi, folder, & template .env"
@@ -662,6 +671,7 @@ velxio-status)
   echo "  ./elemes.sh velxio-runbuild # Build lalu jalankan Velxio standalone"
   echo "  ./elemes.sh velxio-stop     # Hentikan Velxio standalone"
   echo "  ./elemes.sh velxio-status   # Cek status & health Velxio (local/remote)"
+  echo "  ./elemes.sh velxio-test     # Jalankan test suite modul Velxio (terpisah)"
   ;;
 esac
 
diff --git a/services/tests/test_content_editor_routes.py b/services/tests/test_content_editor_routes.py
index bf7d516..5ae10c3 100644
--- a/services/tests/test_content_editor_routes.py
+++ b/services/tests/test_content_editor_routes.py
@@ -189,8 +189,63 @@ def test_preview_invalid_quiz_two_correct(client):
     assert "tepat satu" in data["message"]
 
 
+def test_preview_arduino_velxio_tabs(client):
+    _seed_and_setup()
+    _login_teacher(client)
+    body = (
+        "# LED Arduino\n\n"
+        "Materi pengenalan LED.\n\n"
+        "---INITIAL_CODE_ARDUINO---\n"
+        "void setup() { pinMode(13, OUTPUT); }\n"
+        "void loop() { digitalWrite(13, HIGH); }\n"
+        "---END_INITIAL_CODE_ARDUINO---\n\n"
+        "---VELXIO_CIRCUIT---\n"
+        '{"board": "arduino:avr:uno"}\n'
+        "---END_VELXIO_CIRCUIT---\n"
+    )
+    resp = client.post("/content/preview", json={"body": body})
+    assert resp.status_code == 200
+    data = resp.get_json()
+    assert data["success"] is True
+    assert data["active_tabs"] == ["velxio"]
+    assert "LED Arduino" in data["lesson_content"]
+
+
 # ── Publish ───────────────────────────────────────────────────────
 
+def test_publish_arduino_velxio_lesson(client):
+    _seed_and_setup()
+    _login_teacher(client)
+    target_path = "test_editor/arduino_lesson.md"
+    (TEST_CONTENT / target_path).write_text("# Old", encoding="utf-8")
+
+    body = (
+        "# Belajar Arduino Uno\n\n"
+        "---INITIAL_CODE_ARDUINO---\n"
+        "void setup() {}\n"
+        "---END_INITIAL_CODE_ARDUINO---\n\n"
+        "---VELXIO_CIRCUIT---\n"
+        '{"board": "arduino:avr:uno", "components": []}\n'
+        "---END_VELXIO_CIRCUIT---\n"
+    )
+
+    resp = client.post("/content/drafts", json={
+        "target_path": target_path,
+        "body": body,
+        "base_mtime": os.path.getmtime(str(TEST_CONTENT / target_path)),
+    })
+    draft_id = resp.get_json()["draft_id"]
+
+    resp = client.post(f"/content/drafts/{draft_id}/publish")
+    assert resp.status_code == 200
+    assert resp.get_json()["success"] is True
+
+    # Verify published file on disk
+    saved = (TEST_CONTENT / target_path).read_text(encoding="utf-8")
+    assert "---INITIAL_CODE_ARDUINO---" in saved
+    assert "---VELXIO_CIRCUIT---" in saved
+    assert "arduino:avr:uno" in saved
+
 def test_publish_success(client):
     _seed_and_setup()
     _login_teacher(client)