diff --git a/dm/pkg/checker/mysql_server.go b/dm/pkg/checker/mysql_server.go
index 315de55db5b..1f0171391fe 100644
--- a/dm/pkg/checker/mysql_server.go
+++ b/dm/pkg/checker/mysql_server.go
@@ -35,14 +35,14 @@ func NewMySQLVersionChecker(db *sql.DB, dbinfo *dbutil.DBConfig) RealChecker {
 }
 
 // SupportedVersion defines the MySQL/MariaDB version that DM/syncer supports
-// * 5.6.0 <= MySQL Version < 8.0.0.
+// * 5.6.0 <= MySQL Version < 8.1.0.
 var SupportedVersion = map[string]struct {
 	Min MySQLVersion
 	Max MySQLVersion
 }{
 	"mysql": {
 		MySQLVersion{5, 6, 0},
-		MySQLVersion{8, 0, 0},
+		MySQLVersion{8, 1, 0},
 	},
 }
 
diff --git a/dm/pkg/checker/mysql_server_test.go b/dm/pkg/checker/mysql_server_test.go
index fe1762fb682..fddb1ea7048 100644
--- a/dm/pkg/checker/mysql_server_test.go
+++ b/dm/pkg/checker/mysql_server_test.go
@@ -33,8 +33,10 @@ func TestMysqlVersion(t *testing.T) {
 		{"5.6.0-log", true},
 		{"5.7.0-log", true},
 		{"5.8.0-log", true}, // although it does not exist
-		{"8.0.1-log", false},
-		{"8.0.20", false},
+		{"8.0.1-log", true},
+		{"8.0.20", true},
+		{"8.0.35", true},
+		{"8.1.0", false},
 		{"5.5.50-MariaDB-1~wheezy", false},
 		{"10.1.1-MariaDB-1~wheezy", false},
 		{"10.1.2-MariaDB-1~wheezy", false},
@@ -57,7 +59,7 @@ func TestVersionInstruction(t *testing.T) {
 		db:     db,
 		dbinfo: &dbutil.DBConfig{},
 	}
-	mock.ExpectQuery("SHOW GLOBAL VARIABLES LIKE 'version';").WillReturnRows(sqlmock.NewRows([]string{"Variable_name", "Value"}).AddRow("version", "8.0.20"))
+	mock.ExpectQuery("SHOW GLOBAL VARIABLES LIKE 'version';").WillReturnRows(sqlmock.NewRows([]string{"Variable_name", "Value"}).AddRow("version", "8.1.0"))
 	result := versionChecker.Check(context.Background())
 	require.Equal(t, result.State, StateWarning)
 	require.Equal(t, result.Instruction, "It is recommended that you select a database version that meets the requirements before performing data migration. Otherwise data inconsistency or task exceptions might occur.")
diff --git a/dm/pkg/checker/utils_test.go b/dm/pkg/checker/utils_test.go
index 60e24bbdd17..cae6192d692 100644
--- a/dm/pkg/checker/utils_test.go
+++ b/dm/pkg/checker/utils_test.go
@@ -34,7 +34,8 @@ func TestVersionComparison(t *testing.T) {
 		{"5.6.0", true, false, true, true},
 		{"5.7.0", true, true, true, true},
 		{"5.8.0", true, true, true, true}, // although it does not exist
-		{"8.0.1", true, true, false, false},
+		{"8.0.1", true, true, true, true},
+		{"8.1.0", true, true, false, true},
 		{"255.255.255", true, true, false, false}, // max version
 	}
 
diff --git a/dm/tests/dmctl_command/run.sh b/dm/tests/dmctl_command/run.sh
index 7b22de9c18f..c3d39321c28 100644
--- a/dm/tests/dmctl_command/run.sh
+++ b/dm/tests/dmctl_command/run.sh
@@ -184,7 +184,6 @@ function check_task_lightning() {
 	run_sql_tidb "set @@GLOBAL.max_connections=0;"
 	run_dm_ctl $WORK_DIR "127.0.0.1:$MASTER_PORT" \
 		"check-task $cur/conf/dm-task2.yaml" \
-		"\"passed\": true" 1 \
 		"task precheck cannot accurately check the number of connection needed for Lightning" 0
 	run_sql_tidb "set @@GLOBAL.max_connections=5;"
 	# fail but give warning, because it's using Lightining
diff --git a/dm/tests/extend_column/run.sh b/dm/tests/extend_column/run.sh
index 7d97f732810..362e9bf5f8d 100755
--- a/dm/tests/extend_column/run.sh
+++ b/dm/tests/extend_column/run.sh
@@ -44,7 +44,7 @@ function run_case() {
 		"does not exist in downstream table" 2 \
 		"must contain extended columns" 2 \
 		'"severity": "fail"' 4 \
-		'"severity": "warn"' 1
+		'"severity": "warn"' 0
 
 	# create table in tidb
 	run_sql_file $cur/data/tidb.prepare.sql $TIDB_HOST $TIDB_PORT $TIDB_PASSWORD