diff --git a/apps/desktop/e2e/code-scroll.spec.ts b/apps/desktop/e2e/code-scroll.spec.ts
deleted file mode 100644
index a2b7af9601..0000000000
--- a/apps/desktop/e2e/code-scroll.spec.ts
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import { expect, test, COMPOSER_INPUT } from './fixtures';
-
-test('a one-line Markdown code block exposes native and selection horizontal scrolling', async ({
-  window: page,
-}) => {
-  await page.setViewportSize({ width: 900, height: 700 });
-  const longLine = Array.from(
-    { length: 80 },
-    (_, index) => `word-${String(index).padStart(3, '0')}`,
-  ).join(' ');
-  const composer = page.locator(COMPOSER_INPUT);
-  await composer.fill([
-    'show these keys',
-    '',
-    '```',
-    'short-key',
-    '```',
-    '',
-    '```',
-    longLine,
-    '```',
-  ].join('\n'));
-  await composer.press('Enter');
-
-  const codeBlocks = page.locator('.maka-markdown-code[data-maka-code-layout="single-line"]');
-  const viewport = codeBlocks.last().locator('[role="group"]');
-  await expect(viewport).toBeVisible();
-  await expect(page.getByRole('button', { name: '重新生成' })).toHaveCount(1, {
-    timeout: 20_000,
-  });
-
-  const metrics = await viewport.evaluate((element) => {
-    const node = element as HTMLElement;
-    const rect = node.getBoundingClientRect();
-    const code = node.querySelector('code');
-    const line = code?.querySelector(':scope > [data-line]');
-    if (!code || !line) throw new Error('code viewport has no line content');
-    const codeRect = code.getBoundingClientRect();
-    const lineRect = line.getBoundingClientRect();
-    return {
-      rect: { x: rect.x, y: rect.y, width: rect.width, height: rect.height },
-      clientWidth: node.clientWidth,
-      scrollWidth: node.scrollWidth,
-      lineTopInset: lineRect.top - codeRect.top,
-      lineBottomInset: codeRect.bottom - lineRect.bottom,
-    };
-  });
-  expect(metrics.scrollWidth).toBeGreaterThan(metrics.clientWidth);
-  expect(Math.abs(metrics.lineTopInset - metrics.lineBottomInset)).toBeLessThanOrEqual(1);
-
-  const overflowX = await viewport.evaluate((element) => getComputedStyle(element).overflowX);
-  expect(overflowX).toBe('auto');
-
-  const viewportBox = await viewport.boundingBox();
-  if (!viewportBox) throw new Error('native scroll viewport has no visible bounds');
-  await page.mouse.move(
-    viewportBox.x + viewportBox.width / 2,
-    viewportBox.y + viewportBox.height / 2,
-  );
-  await page.mouse.wheel(240, 0);
-  await expect.poll(
-    () => viewport.evaluate((element) => (element as HTMLElement).scrollLeft),
-  ).toBeGreaterThan(0);
-  const afterWheelScroll = await viewport.evaluate(
-    (element) => (element as HTMLElement).scrollLeft,
-  );
-
-  await viewport.evaluate((element) => {
-    (element as HTMLElement).scrollLeft = 0;
-  });
-  await viewport.focus();
-  await viewport.press('ArrowRight');
-  await expect.poll(
-    () => viewport.evaluate((element) => (element as HTMLElement).scrollLeft),
-  ).toBeGreaterThan(0);
-  const afterKeyboardScroll = await viewport.evaluate(
-    (element) => (element as HTMLElement).scrollLeft,
-  );
-
-  await viewport.evaluate((element) => {
-    (element as HTMLElement).scrollLeft = 0;
-    window.getSelection()?.removeAllRanges();
-  });
-  const line = viewport.locator('code > [data-line]').first();
-  // Font loading reflows the glyphs; measure only after it settles or the
-  // anchor can land outside the text and no selection ever forms.
-  await page.evaluate(() => document.fonts.ready.then(() => undefined));
-  const lineBox = await line.boundingBox();
-  if (!lineBox) throw new Error('code line has no visible bounds');
-  const textY = lineBox.y + Math.min(lineBox.height / 2, 18);
-  await page.mouse.move(lineBox.x + 24, textY);
-  await page.mouse.down();
-  // Prove the selection anchored before the long auto-scroll drag.
-  await page.mouse.move(lineBox.x + 90, textY, { steps: 6 });
-  await expect.poll(
-    () => viewport.evaluate(() => window.getSelection()?.toString().length ?? 0),
-  ).toBeGreaterThan(0);
-  await page.mouse.move(metrics.rect.x + metrics.rect.width + 50, textY, { steps: 20 });
-  await expect.poll(
-    () => viewport.evaluate((element) => (element as HTMLElement).scrollLeft),
-  ).toBeGreaterThan(0);
-  await expect.poll(
-    () => viewport.evaluate(() => window.getSelection()?.toString().length ?? 0),
-  ).toBeGreaterThan(10);
-  const afterSelectionDrag = await viewport.evaluate((element) => ({
-    scrollLeft: (element as HTMLElement).scrollLeft,
-    selection: window.getSelection()?.toString() ?? '',
-  }));
-  await page.mouse.up();
-  expect(afterWheelScroll).toBeGreaterThan(0);
-  expect(afterKeyboardScroll).toBeGreaterThan(0);
-  expect(afterSelectionDrag.scrollLeft).toBeGreaterThan(0);
-  expect(afterSelectionDrag.selection.length).toBeGreaterThan(10);
-});
diff --git a/apps/desktop/scripts/vite-workspace-packages.test.mjs b/apps/desktop/scripts/vite-workspace-packages.test.mjs
index ed7c711fb1..b8d4a7c60c 100644
--- a/apps/desktop/scripts/vite-workspace-packages.test.mjs
+++ b/apps/desktop/scripts/vite-workspace-packages.test.mjs
@@ -87,7 +87,11 @@ test('renderer-facing Runtime Host protocol does not load Node crypto', async (t
     configFile: false,
     root,
     logLevel: 'silent',
-    server: { host: '127.0.0.1', port: 0 },
+    // One request, one assertion — nothing here reacts to a file changing. A
+    // watcher would, and this root is the real repository: `close()` returns
+    // before its recursive scan finishes, and the unfinished fs requests keep
+    // the process alive until the workspace suite hits its own timeout.
+    server: { host: '127.0.0.1', port: 0, watch: null },
     optimizeDeps: { noDiscovery: true, include: [] },
     plugins: [workspacePackagesPlugin(repoRoot)],
   });
@@ -102,5 +106,12 @@ test('renderer-facing Runtime Host protocol does not load Node crypto', async (t
   const transformed = await response.text();
 
   assert.equal(response.status, 200, transformed);
+  // A missing dist is served as the SPA fallback, and index.html trivially
+  // satisfies the assertion below. Say so instead of passing.
+  assert.doesNotMatch(
+    transformed,
+    /^<!doctype html>/iu,
+    'Vite served the SPA fallback; build @maka/runtime-host first',
+  );
   assert.doesNotMatch(transformed, /vite-browser-external:node:crypto/u);
 });