diff --git a/tests/test_chat_poll.c b/tests/test_chat_poll.c
index d77955de..db351989 100644
--- a/tests/test_chat_poll.c
+++ b/tests/test_chat_poll.c
@@ -157,12 +157,16 @@ static void sql_faults(struct UTUN_INSTANCE* inst, const char* channel, const ch
             u_free(result);
             assert(message_count(inst, channel) == messages + (int)publish);
             snprintf(read, sizeof(read), "{\"cmd\":\"feedback\",\"ch\":\"%s\",\"message_id\":\"%s\"}", channel, acknowledged);
+            assert(!merkle_sync_read_hash(inst, MT_DATA_FEEDBACK, channel, 0, 0, before)); unsigned events = changed_events;
             result = command(inst, read, 0); u_free(result);
-            assert(message_count(inst, channel) == messages + (int)publish);
+            assert(message_count(inst, channel) == messages + (int)publish && changed_events == events);
+            assert(!merkle_sync_read_hash(inst, MT_DATA_FEEDBACK, channel, 0, 0, after) && !memcmp(before, after, 32));
         }
         int messages = message_count(inst, channel); unsigned events = changed_events;
+        assert(!merkle_sync_read_hash(inst, MT_DATA_FEEDBACK, channel, 0, 0, before));
         fail_ack_allocation = 1; result = command(inst, request, -1); u_free(result);
         assert(!fail_ack_allocation && changed_events == events && message_count(inst, channel) == messages);
+        assert(!merkle_sync_read_hash(inst, MT_DATA_FEEDBACK, channel, 0, 0, after) && !memcmp(before, after, 32));
     }
     chat_event_set_handler(inst, NULL);
     printf("PASS: %u poll SQL faults,8 post-commit read failures,2 pre-commit allocation failures; state/events preserved, read-only retry, complete emoji text\n", cases);