diff --git a/mobile/src/worktree/server-workspaces.test.ts b/mobile/src/worktree/server-workspaces.test.ts
index 3d12e004cac..525e01a7435 100644
--- a/mobile/src/worktree/server-workspaces.test.ts
+++ b/mobile/src/worktree/server-workspaces.test.ts
@@ -1,4 +1,7 @@
-import { describe, expect, it } from 'vitest'
+import { describe, expect, it, vi } from 'vitest'
+
+// The desktop's server-list feed loads react-native; its timer never runs without a subscriber.
+vi.mock('react-native', () => ({}))
 import type { MobileRelayHost } from '../../../src/shared/mobile-relay-hosts-contract'
 import { applyServerWorkspaces, NO_SERVER_WORKSPACES } from './server-workspaces'
 import type { Worktree } from './workspace-list-types'