diff --git a/frontend/e2e/smoke.spec.ts b/frontend/e2e/smoke.spec.ts
index f93ada6..181368b 100644
--- a/frontend/e2e/smoke.spec.ts
+++ b/frontend/e2e/smoke.spec.ts
@@ -1,6 +1,6 @@
 import { test, expect } from "@playwright/test";
 
-test("login → create workflow → drop node → save", async ({ page }) => {
+test("login → create workflow → drop node → edit in dialog → save → reload persists label", async ({ page }) => {
   await page.goto("/login");
   await page.getByLabel(/password/i).fill("hunter2");
   await page.getByRole("button", { name: /sign in/i }).click();
@@ -20,8 +20,27 @@ test("login → create workflow → drop node → save", async ({ page }) => {
   await tile.dragTo(canvas);
   await expect(page.locator(".react-flow__node")).toHaveCount(1);
 
+  // Double-click the just-dropped node to open the editor dialog.
+  const nodeEl = page.locator(".react-flow__node").first();
+  await nodeEl.dblclick();
+
+  // Dialog appears with the three column headings.
+  await expect(page.getByRole("heading", { name: /^input$/i })).toBeVisible();
+  await expect(page.getByRole("heading", { name: /^parameters$/i })).toBeVisible();
+  await expect(page.getByRole("heading", { name: /^output$/i })).toBeVisible();
+
+  // Edit the label to something distinctive.
+  const label = page.getByLabel(/node label/i);
+  await label.fill("Custom smoke node");
+
+  // Close the dialog with the Done button.
+  await page.getByRole("button", { name: /^done$/i }).click();
+  await expect(page.getByRole("heading", { name: /^parameters$/i })).not.toBeVisible();
+
   await page.getByRole("button", { name: /save/i }).click();
   // No visible confirmation — reload and assert the node persisted.
   await page.reload();
   await expect(page.locator(".react-flow__node")).toHaveCount(1);
+  // The canvas should show the custom label on the node.
+  await expect(page.locator(".react-flow__node")).toContainText("Custom smoke node");
 });