diff --git a/tests/script/tsim/stable/alter_count.sim b/tests/script/tsim/stable/alter_count.sim
index 3bd78162f3..e5af9a5735 100644
--- a/tests/script/tsim/stable/alter_count.sim
+++ b/tests/script/tsim/stable/alter_count.sim
@@ -248,8 +248,9 @@ endi
 
 print ============== step18
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 3000
 system sh/exec.sh -n dnode1 -s start
-sql connect
+sleep 3000
 
 #sql select count(g) from tb
 #if $data00 != 12 then
diff --git a/tests/script/tsim/stable/alter_insert1.sim b/tests/script/tsim/stable/alter_insert1.sim
index 513a7a0a14..82781f2fe5 100644
--- a/tests/script/tsim/stable/alter_insert1.sim
+++ b/tests/script/tsim/stable/alter_insert1.sim
@@ -936,8 +936,9 @@ endi
 print ======== step9
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 3000
 system sh/exec.sh -n dnode1 -s start
-sql connect
+sleep 3000
 
 sql select * from tb order by ts asc
 if $rows != 8 then
diff --git a/tests/script/tsim/stable/alter_insert2.sim b/tests/script/tsim/stable/alter_insert2.sim
index 5d765ede55..a30175f398 100644
--- a/tests/script/tsim/stable/alter_insert2.sim
+++ b/tests/script/tsim/stable/alter_insert2.sim
@@ -604,8 +604,9 @@ sql_error alter table tb drop column a
 
 print ======== step9
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+sleep 3000
 system sh/exec.sh -n dnode1 -s start
-sql connect
+sleep 3000
 
 sql select * from tb order by ts desc
 if $rows != 7 then