diff --git a/tests/system-test/1-insert/create_retentions.py b/tests/system-test/1-insert/create_retentions.py
index 3026627f1c1653bdd76b12021ab44a875343c12d..bde499d91a144c5171638f73ecd2ad6a1cf5dddc 100644
--- a/tests/system-test/1-insert/create_retentions.py
+++ b/tests/system-test/1-insert/create_retentions.py
@@ -226,6 +226,8 @@ class TDTestCase:
 
         tdLog.printNoPrefix("==========step3:all check")
         self.all_test()
+        tdSql.execute("drop database if exists db1 ")
+        tdSql.execute("drop database if exists db2 ")
 
         tdDnodes.stop(1)
         tdDnodes.start(1)