diff --git a/dm/tests/_utils/test_prepare b/dm/tests/_utils/test_prepare
index de838513889..04e3f298fcd 100644
--- a/dm/tests/_utils/test_prepare
+++ b/dm/tests/_utils/test_prepare
@@ -10,6 +10,13 @@ function cleanup_data() {
     run_sql "drop database if exists dm_meta" $TIDB_PORT $TIDB_PASSWORD
 }
 
+function cleanup_data_upstream() {
+    for target_db in "$@"; do
+        run_sql "drop database if exists \`${target_db}\`" $MYSQL_PORT1 $MYSQL_PASSWORD1
+        run_sql "drop database if exists \`${target_db}\`" $MYSQL_PORT2 $MYSQL_PASSWORD2
+    done
+}
+
 function cleanup_process() {
     dm_master_num=$(ps aux >temp && grep "dm-master.test" temp | wc -l && rm temp)
     echo "$dm_master_num dm-master alive"
diff --git a/dm/tests/adjust_gtid/conf/diff_config_revert_1.toml b/dm/tests/adjust_gtid/conf/diff_config_revert_1.toml
new file mode 100644
index 00000000000..455ed32451f
--- /dev/null
+++ b/dm/tests/adjust_gtid/conf/diff_config_revert_1.toml
@@ -0,0 +1,31 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql1"
+
+    target-check-tables = ["adjust_gtid.t?*"]
+
+
+[data-sources]
+[data-sources.mysql1]
+host = "127.0.0.1"
+port = 3306
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/adjust_gtid/conf/diff_config_revert_2.toml b/dm/tests/adjust_gtid/conf/diff_config_revert_2.toml
new file mode 100644
index 00000000000..6d38ad7fb17
--- /dev/null
+++ b/dm/tests/adjust_gtid/conf/diff_config_revert_2.toml
@@ -0,0 +1,31 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql2"
+
+    target-check-tables = ["adjust_gtid.t?*"]
+
+
+[data-sources]
+[data-sources.mysql2]
+host = "127.0.0.1"
+port = 3307
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/adjust_gtid/run.sh b/dm/tests/adjust_gtid/run.sh
index 751f2fca8a3..f51a28a6e9d 100755
--- a/dm/tests/adjust_gtid/run.sh
+++ b/dm/tests/adjust_gtid/run.sh
@@ -84,10 +84,13 @@ function run() {
 	# avoid cannot unmarshal !!str `binlog-...` into uint32 error
 	sed -i "s/binlog-pos-placeholder-1/4/g" $WORK_DIR/dm-task.yaml
 	sed -i "s/binlog-pos-placeholder-2/4/g" $WORK_DIR/dm-task.yaml
-	dmctl_start_task "$WORK_DIR/dm-task.yaml" "--remove-meta"
+	# start DM task. don't check error because it will meet injected error soon
+	run_dm_ctl $WORK_DIR "127.0.0.1:$MASTER_PORT" \
+		"start-task $WORK_DIR/dm-task.yaml --remove-meta"
 
 	# use sync_diff_inspector to check full dump loader
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	name1=$(grep "Log: " $WORK_DIR/worker1/dumped_data.$TASK_NAME/metadata | awk -F: '{print $2}' | tr -d ' ')
 	pos1=$(grep "Pos: " $WORK_DIR/worker1/dumped_data.$TASK_NAME/metadata | awk -F: '{print $2}' | tr -d ' ')
@@ -129,7 +132,8 @@ function run() {
 	check_rpc_alive $cur/../bin/check_worker_online 127.0.0.1:$WORKER2_PORT
 
 	# use sync_diff_inspector to check incremental dump loader
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	run_sql_both_source "SET @@GLOBAL.SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'"
 	run_sql_both_source "SET @@global.time_zone = 'SYSTEM';"
diff --git a/dm/tests/dm_syncer/run.sh b/dm/tests/dm_syncer/run.sh
index 1ed98da1d8a..11994fdb95c 100755
--- a/dm/tests/dm_syncer/run.sh
+++ b/dm/tests/dm_syncer/run.sh
@@ -71,7 +71,7 @@ function run() {
 	run_dm_syncer $WORK_DIR/syncer2 $WORK_DIR/dm-syncer-2.toml $meta_file --syncer-config-format syncer2
 
 	# wait for dm_syncer to init and start
-	sleep 5
+	sleep 10
 	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
 	check_sync_diff $WORK_DIR $cur/conf/diff_config_blalist.toml
 	check_sync_diff $WORK_DIR $cur/conf/diff_config_route_rules.toml
diff --git a/dm/tests/full_mode/conf/diff_config_revert_1.toml b/dm/tests/full_mode/conf/diff_config_revert_1.toml
new file mode 100644
index 00000000000..f690ce6e804
--- /dev/null
+++ b/dm/tests/full_mode/conf/diff_config_revert_1.toml
@@ -0,0 +1,30 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql1"
+
+    target-check-tables = ["full_mode.t?*"]
+
+
+[data-sources]
+[data-sources.mysql1]
+host = "127.0.0.1"
+port = 3306
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/full_mode/conf/diff_config_revert_2.toml b/dm/tests/full_mode/conf/diff_config_revert_2.toml
new file mode 100644
index 00000000000..84a3ecd2d43
--- /dev/null
+++ b/dm/tests/full_mode/conf/diff_config_revert_2.toml
@@ -0,0 +1,30 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql2"
+
+    target-check-tables = ["full_mode.t?*"]
+
+
+[data-sources]
+[data-sources.mysql2]
+host = "127.0.0.1"
+port = 3307
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/full_mode/run.sh b/dm/tests/full_mode/run.sh
index 714a9e8a610..30a8344eadc 100755
--- a/dm/tests/full_mode/run.sh
+++ b/dm/tests/full_mode/run.sh
@@ -60,6 +60,7 @@ function fail_acquire_global_lock() {
 		"you need (at least one of) the RELOAD privilege(s) for this operation" 2
 
 	cleanup_data full_mode
+	cleanup_data_upstream full_mode
 	cleanup_process $*
 }
 
@@ -104,7 +105,6 @@ function escape_schema() {
 
 	# start DM task only
 	dmctl_start_task "$WORK_DIR/dm-task.yaml" "--remove-meta"
-	check_sync_diff $WORK_DIR $WORK_DIR/diff_config.toml
 
 	check_log_contain_with_retry 'clean dump files' $WORK_DIR/worker1/log/dm-worker.log
 	check_log_contain_with_retry 'clean dump files' $WORK_DIR/worker2/log/dm-worker.log
@@ -118,6 +118,7 @@ function escape_schema() {
 	check_metric $WORKER2_PORT 'dumpling_dump_finished_tables' 3 0 3
 
 	cleanup_data full/mode
+	cleanup_data_upstream full/mode
 	cleanup_process $*
 }
 
@@ -130,7 +131,8 @@ function empty_data() {
 	init_cluster
 
 	dmctl_start_task "$cur/conf/dm-task.yaml" "--remove-meta"
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	run_dm_ctl $WORK_DIR "127.0.0.1:$MASTER_PORT" \
 		"query-status test" \
@@ -142,6 +144,7 @@ function empty_data() {
 	check_log_contains $WORK_DIR/worker2/log/dm-worker.log "progress=\"100.00 %\""
 
 	cleanup_data full_mode
+	cleanup_data_upstream full_mode
 	cleanup_process $*
 }
 
@@ -190,7 +193,8 @@ function run() {
 	dmctl_start_task "$cur/conf/dm-task.yaml" "--remove-meta"
 
 	# use sync_diff_inspector to check full dump loader
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	echo "check dump files have been cleaned"
 	ls $WORK_DIR/worker1/dumped_data.test && exit 1 || echo "worker1 auto removed dump files"
diff --git a/dm/tests/incremental_mode/conf/diff_config_revert_1.toml b/dm/tests/incremental_mode/conf/diff_config_revert_1.toml
new file mode 100644
index 00000000000..45328c12217
--- /dev/null
+++ b/dm/tests/incremental_mode/conf/diff_config_revert_1.toml
@@ -0,0 +1,30 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql1"
+
+    target-check-tables = ["incremental_mode.t?*"]
+
+
+[data-sources]
+[data-sources.mysql1]
+host = "127.0.0.1"
+port = 3306
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/incremental_mode/conf/diff_config_revert_2.toml b/dm/tests/incremental_mode/conf/diff_config_revert_2.toml
new file mode 100644
index 00000000000..16ed402a93f
--- /dev/null
+++ b/dm/tests/incremental_mode/conf/diff_config_revert_2.toml
@@ -0,0 +1,30 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/ticdc_dm_test/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql2"
+
+    target-check-tables = ["incremental_mode.t?*"]
+
+
+[data-sources]
+[data-sources.mysql2]
+host = "127.0.0.1"
+port = 3307
+user = "root"
+password = "123456"
+
+[data-sources.tidb0]
+host = "127.0.0.1"
+port = 4000
+user = "test"
+password = "123456"
diff --git a/dm/tests/incremental_mode/run.sh b/dm/tests/incremental_mode/run.sh
index 40774b7a469..b8b7dbbf171 100755
--- a/dm/tests/incremental_mode/run.sh
+++ b/dm/tests/incremental_mode/run.sh
@@ -76,7 +76,8 @@ function run() {
 	sed -i "s/binlog-pos-placeholder-2/4/g" $WORK_DIR/dm-task.yaml
 	dmctl_start_task $WORK_DIR/dm-task.yaml
 
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	dmctl_stop_task $TASK_NAME
 
@@ -218,7 +219,9 @@ function run() {
 	check_rpc_alive $cur/../bin/check_worker_online 127.0.0.1:$WORKER2_PORT
 
 	sleep 3
-	dmctl_start_task $WORK_DIR/dm-task.yaml
+	# start DM task. don't check error because it will meet injected error soon
+	run_dm_ctl $WORK_DIR "127.0.0.1:$MASTER_PORT" \
+		"start-task $WORK_DIR/dm-task.yaml"
 
 	# the task should paused by `FlushCheckpointStage` failpont before flush old checkpoint.
 	# `db2.increment.sql` has no DDL, so we check count of content as `1`.
@@ -263,7 +266,8 @@ function run() {
 		"resume-task test" \
 		"\"result\": true" 3
 
-	check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_1.toml
+	check_sync_diff $WORK_DIR $cur/conf/diff_config_revert_2.toml
 
 	# test rotate binlog, after rotate and ddl, master binlog should be equal to sync binlog
 	run_sql "flush logs;" $MYSQL_PORT1 $MYSQL_PASSWORD1