diff --git a/web/src/hooks/useMissions-agent-selection.test.tsx b/web/src/hooks/useMissions-agent-selection.test.tsx
index 652574d0f7..ccb99feb64 100644
--- a/web/src/hooks/useMissions-agent-selection.test.tsx
+++ b/web/src/hooks/useMissions-agent-selection.test.tsx
@@ -195,6 +195,11 @@ beforeEach(() => {
   globalThis.fetch = vi.fn().mockResolvedValue({ ok: true })
 })
 
+afterEach(() => {
+  vi.clearAllTimers()
+  vi.useRealTimers()
+})
+
 describe('agent selection: persisted "none" auto-selects available agent', () => {
   it('auto-selects the best available agent when persisted is "none"', async () => {
     localStorage.setItem('kc_selected_agent', 'none')