diff --git a/src/web/public/sw.js b/src/web/public/sw.js
index 966d302c..dffb03fd 100644
--- a/src/web/public/sw.js
+++ b/src/web/public/sw.js
@@ -101,6 +101,10 @@ self.addEventListener('fetch', (event) => {
   if (request.headers.get('upgrade') === 'websocket') return;
   if (request.headers.get('accept') === 'text/event-stream') return;
   if (request.url.includes('/api/')) return;
+  // A rendered HTML page is served `no-store` behind a capability that logout
+  // revokes; caching a popped-out page here would let the offline fallback
+  // serve it after the capability is gone.
+  if (request.url.includes('/html-view/')) return;
 
   event.respondWith(
     fetch(request)
diff --git a/test/sw-fetch-skip.test.ts b/test/sw-fetch-skip.test.ts
new file mode 100644
index 00000000..2280960a
--- /dev/null
+++ b/test/sw-fetch-skip.test.ts
@@ -0,0 +1,57 @@
+/**
+ * @fileoverview Which requests the service worker leaves to the network.
+ *
+ * The fetch handler caches every OK GET it answers, and the offline fallback
+ * serves from that cache. A rendered HTML page (`/html-view/<cap>/...`) is
+ * served `no-store` behind a capability that logout revokes, so a popped-out
+ * page must never land there: it is skipped like `/api/`.
+ *
+ * Runs the shipped sw.js in a `vm` context with a stub ServiceWorkerGlobalScope
+ * and drives its real fetch listener.
+ */
+
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import vm from 'node:vm';
+import { describe, expect, it, vi } from 'vitest';
+
+const swJs = readFileSync(resolve(import.meta.dirname, '../src/web/public/sw.js'), 'utf8');
+
+function loadFetchListener(): (event: unknown) => void {
+  const listeners = new Map<string, (event: unknown) => void>();
+  const self = {
+    location: { pathname: '/sw.js', origin: 'http://localhost' },
+    addEventListener: (type: string, fn: (event: unknown) => void) => listeners.set(type, fn),
+  };
+  // A fetch that never settles: the listener only has to decide whether to answer.
+  const fetch = vi.fn(() => new Promise(() => {}));
+  vm.runInContext(swJs, vm.createContext({ self, console, caches: {}, fetch, URL }), { filename: 'sw.js' });
+  const listener = listeners.get('fetch');
+  expect(listener, 'sw.js registers a fetch listener').toBeDefined();
+  return listener!;
+}
+
+function fetchEvent(path: string) {
+  return {
+    request: { method: 'GET', url: `http://localhost${path}`, headers: { get: () => null } },
+    respondWith: vi.fn(),
+  };
+}
+
+describe('service worker fetch skip list', () => {
+  it('leaves rendered HTML pages and the API to the network', () => {
+    const onFetch = loadFetchListener();
+    for (const path of ['/html-view/AAAAAAAAAAAAAAAAAAAAAAAA/index.html', '/api/status']) {
+      const event = fetchEvent(path);
+      onFetch(event);
+      expect(event.respondWith, path).not.toHaveBeenCalled();
+    }
+  });
+
+  it('still answers an app asset', () => {
+    const onFetch = loadFetchListener();
+    const event = fetchEvent('/app.js');
+    onFetch(event);
+    expect(event.respondWith).toHaveBeenCalledTimes(1);
+  });
+});