diff --git a/utils/test/c/sml_test.c b/utils/test/c/sml_test.c
index 5e9d82e71e..f91b14b6d8 100644
--- a/utils/test/c/sml_test.c
+++ b/utils/test/c/sml_test.c
@@ -982,6 +982,9 @@ int smlProcess_18784_Test() {
     rowIndex++;
   }
   taos_free_result(pRes);
+  pRes = taos_query(taos, "drop database if exists db_18784");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -1187,6 +1190,9 @@ int sml_ts2164_Test() {
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
   int code = taos_errno(pRes);
   taos_free_result(pRes);
+  pRes = taos_query(taos, "drop database if exists line_test");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -1236,6 +1242,8 @@ int sml_ts3116_Test() {
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
   code = taos_errno(pRes);
   taos_free_result(pRes);
+  pRes = taos_query(taos, "drop database if exists ts3116");
+  taos_free_result(pRes);
   taos_close(taos);
 
   return code;
@@ -1449,6 +1457,13 @@ int sml_td24070_Test() {
   code = taos_errno(pRes);
   ASSERT(code == 0);
   taos_free_result(pRes);
+
+  pRes = taos_query(taos, "drop database if exists td24070_write");
+  taos_free_result(pRes);
+
+  pRes = taos_query(taos, "drop database if exists td24070_read");
+  taos_free_result(pRes);
+
   taos_close(taos);
   // test table privilege
 
@@ -1477,6 +1492,10 @@ int sml_td23881_Test() {
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
   int code = taos_errno(pRes);
   taos_free_result(pRes);
+
+  pRes = taos_query(taos, "drop database if exists line_23881");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -1691,6 +1710,8 @@ int sml_ts2385_Test() {
 
   code = taos_errno(pRes);
   taos_free_result(pRes);
+  pRes = taos_query(taos, "drop database if exists ts2385");
+  taos_free_result(pRes);
   taos_close(taos);
 
   return code;
@@ -1784,6 +1805,9 @@ int sml_td24559_Test() {
   }
   taos_free_result(pRes);
 
+  pRes = taos_query(taos, "drop database if exists td24559");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -1889,6 +1913,9 @@ int sml_td29691_Test() {
   ASSERT(code == TSDB_CODE_PAR_DUPLICATED_COLUMN);
   taos_free_result(pRes);
 
+  pRes = taos_query(taos, "drop database if exists td29691");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -1942,6 +1969,9 @@ int sml_td18789_Test() {
   }
   taos_free_result(pRes);
 
+  pRes = taos_query(taos, "drop database if exists td18789");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;
@@ -2047,6 +2077,9 @@ int sml_td29373_Test() {
   ASSERT(code == TSDB_CODE_SML_NOT_SUPPORT_PK);
   taos_free_result(pRes);
 
+  pRes = taos_query(taos, "drop database if exists td29373");
+  taos_free_result(pRes);
+
   taos_close(taos);
 
   return code;