diff --git a/.kiro/specs/ha-heartbeat-liveness/tasks.md b/.kiro/specs/ha-heartbeat-liveness/tasks.md
index 0b847e5d..6d74eec8 100644
--- a/.kiro/specs/ha-heartbeat-liveness/tasks.md
+++ b/.kiro/specs/ha-heartbeat-liveness/tasks.md
@@ -58,7 +58,7 @@
   - _Boundary: config_repl.c, ha.c (ha_on_primary_ctrl_fd_rdhup)_
 
 - [ ] 4. Validation: unit and integration tests
-- [ ] 4.1 (P) Unit tests for standby liveness poll
+- [x] 4.1 (P) Unit tests for standby liveness poll
   - Test `liveness_poll_fn` fires `ha_on_primary_ctrl_fd_rdhup` when `now - last_activity >= heartbeat_timeout_ms`
   - Test `liveness_poll_fn` re-arms (no failover) when `now - last_activity < heartbeat_timeout_ms`
   - Test `liveness_poll_fn` with `cancelled = 1` is a no-op (no failover, no re-arm)