diff --git a/backend/internal/certificate/renewal_test.go b/backend/internal/certificate/renewal_test.go
index f22ed16..7eb5562 100644
--- a/backend/internal/certificate/renewal_test.go
+++ b/backend/internal/certificate/renewal_test.go
@@ -115,3 +115,53 @@ func TestRenewalSchedulerStopsRetryWhenContextCanceled(t *testing.T) {
 		t.Fatalf("取消后的紧急续期重试报告错误：%+v calls=%d", report, len(service.ids))
 	}
 }
+
+type wakeRenewalLister struct {
+	calls chan struct{}
+}
+
+func (l *wakeRenewalLister) List(context.Context) ([]domain.Domain, error) {
+	select {
+	case l.calls <- struct{}{}:
+	default:
+	}
+	return nil, nil
+}
+
+func TestRenewalSchedulerUpdatePolicyWakesRunningScheduler(t *testing.T) {
+	lister := &wakeRenewalLister{calls: make(chan struct{}, 4)}
+	scheduler := NewRenewalSchedulerWithPolicy(lister, &renewalService{}, RenewalPolicy{
+		CheckInterval:       time.Hour,
+		NearExpiryThreshold: 10 * 24 * time.Hour,
+		RenewalThreshold:    6 * 24 * time.Hour,
+		UrgentThreshold:     3 * 24 * time.Hour,
+		MaxRetries:          3,
+		RetryInterval:       time.Minute,
+	})
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	scheduler.Start(ctx)
+	select {
+	case <-lister.calls:
+	case <-time.After(time.Second):
+		t.Fatal("\u7eed\u671f\u8c03\u5ea6\u5668\u542f\u52a8\u540e\u672a\u6267\u884c\u9996\u6b21\u68c0\u67e5")
+	}
+
+	scheduler.UpdatePolicy(RenewalPolicy{
+		CheckInterval:       2 * time.Hour,
+		NearExpiryThreshold: 12 * 24 * time.Hour,
+		RenewalThreshold:    8 * 24 * time.Hour,
+		UrgentThreshold:     4 * 24 * time.Hour,
+		MaxRetries:          5,
+		RetryInterval:       2 * time.Minute,
+	})
+	if got := scheduler.Policy(); got.CheckInterval != 2*time.Hour || got.NearExpiryThreshold != 12*24*time.Hour || got.RenewalThreshold != 8*24*time.Hour || got.UrgentThreshold != 4*24*time.Hour || got.MaxRetries != 5 || got.RetryInterval != 2*time.Minute {
+		t.Fatalf("\u8fd0\u884c\u65f6\u7eed\u671f\u7b56\u7565\u672a\u66f4\u65b0\uff1a%+v", got)
+	}
+	select {
+	case <-lister.calls:
+	case <-time.After(time.Second):
+		t.Fatal("\u66f4\u65b0\u7eed\u671f\u7b56\u7565\u540e\u8c03\u5ea6\u5668\u672a\u88ab\u7acb\u5373\u5524\u9192")
+	}
+}