diff --git a/src/test/regress/input/hw_subpartition_vacuum_partition.source b/src/test/regress/input/hw_subpartition_vacuum_partition.source
index 6b18d356d..ad861fce2 100644
--- a/src/test/regress/input/hw_subpartition_vacuum_partition.source
+++ b/src/test/regress/input/hw_subpartition_vacuum_partition.source
@@ -4,7 +4,7 @@ SET CURRENT_SCHEMA TO hw_subpartition_vacuum_partition;
 
 \! @abs_bindir@/gs_guc reload -Z datanode -D @abs_srcdir@/tmp_check/datanode1 -c "autovacuum = off" >/dev/null 2>&1
 \! @abs_bindir@/gs_guc reload -Z datanode -D @abs_srcdir@/tmp_check/datanode1 -c "enable_defer_calculate_snapshot = off" >/dev/null 2>&1
-
+select pg_sleep(1);
 CREATE TABLE temp1(c1 int, c2 int);
 
 --
diff --git a/src/test/regress/output/hw_subpartition_vacuum_partition.source b/src/test/regress/output/hw_subpartition_vacuum_partition.source
index 3c7712d3c..7f620a079 100644
--- a/src/test/regress/output/hw_subpartition_vacuum_partition.source
+++ b/src/test/regress/output/hw_subpartition_vacuum_partition.source
@@ -4,6 +4,12 @@ CREATE SCHEMA hw_subpartition_vacuum_partition;
 SET CURRENT_SCHEMA TO hw_subpartition_vacuum_partition;
 \! @abs_bindir@/gs_guc reload -Z datanode -D @abs_srcdir@/tmp_check/datanode1 -c "autovacuum = off" >/dev/null 2>&1
 \! @abs_bindir@/gs_guc reload -Z datanode -D @abs_srcdir@/tmp_check/datanode1 -c "enable_defer_calculate_snapshot = off" >/dev/null 2>&1
+select pg_sleep(1);
+ pg_sleep 
+----------
+ 
+(1 row)
+
 CREATE TABLE temp1(c1 int, c2 int);
 --
 --1. test for basic function