diff --git a/tests/pytest/import_merge/import_update_1.py b/tests/pytest/import_merge/import_update_1.py
index f3137033420f831eec25f75039beeefbf2803537..8a17b1d8a311d5af4a9f58a57e5395bd622a93c1 100644
--- a/tests/pytest/import_merge/import_update_1.py
+++ b/tests/pytest/import_merge/import_update_1.py
@@ -55,7 +55,7 @@ class TDTestCase:
         tdSql.execute('''drop database if exists test_updata_1 ;''')  
         # update 0 不更新 ; update 1 覆盖更新 ;update 2 合并更新
         tdLog.info("========== test database updata = 1 ==========") 
-        tdSql.execute('''create database test_updata_1 update 1 minrows 10 maxrows 200 ;''')   
+        tdSql.execute('''create database test_updata_1 update 1 minrows 10 maxrows 200 keep 36500;''')   
         tdSql.execute('''use test_updata_1;''')   
         tdSql.execute('''create stable stable_1
                     (ts timestamp , q_int int , q_bigint bigint , q_smallint smallint , q_tinyint tinyint,