diff --git a/tests/pytest/functions/function_elapsed_case.py b/tests/pytest/functions/function_elapsed_case.py
index 50fbb0fe3244ec214e040f43962321a28ed31d9b..5ebad0547c280f576137d6b00dbcd4f6b52f9428 100644
--- a/tests/pytest/functions/function_elapsed_case.py
+++ b/tests/pytest/functions/function_elapsed_case.py
@@ -345,7 +345,8 @@ class ElapsedCase:
         tdSql.error("select elapsed(*) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
         tdSql.error("select elapsed(ts, '1s') from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
         tdSql.error("select elapsed(ts, i) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
-        #tdSql.error("select elapsed(ts, now) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
+        tdSql.error("select elapsed(ts, now) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
+        tdSql.error("select elapsed(ts, now-7d+2h-3m+2s) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
         tdSql.error("select elapsed(ts, ts) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
         tdSql.error("select elapsed(ts + 1) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")
         tdSql.error("select elapsed(ts, 1b) from t1 where ts > '2021-11-22 00:00:00' and ts < '2021-11-23 00:00:00'")