diff --git a/domain/db_test.go b/domain/db_test.go
index eee241ee7b0d4..990ec2ad41a70 100644
--- a/domain/db_test.go
+++ b/domain/db_test.go
@@ -25,8 +25,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// SubTestDomainSession is batched in TestDomainSerial
-func SubTestDomainSession(t *testing.T) {
+func TestDomainSession(t *testing.T) {
 	lease := 50 * time.Millisecond
 	store, err := mockstore.NewMockStore()
 	require.NoError(t, err)
diff --git a/domain/domain_test.go b/domain/domain_test.go
index 4d9e96ebdd913..bed887c72133f 100644
--- a/domain/domain_test.go
+++ b/domain/domain_test.go
@@ -45,8 +45,7 @@ import (
 	"go.etcd.io/etcd/integration"
 )
 
-// SubTestInfo is batched in TestDomainSerial
-func SubTestInfo(t *testing.T) {
+func TestInfo(t *testing.T) {
 	if runtime.GOOS == "windows" {
 		t.Skip("integration.NewClusterV3 will create file contains a colon which is not allowed on Windows")
 	}
@@ -154,8 +153,7 @@ func SubTestInfo(t *testing.T) {
 	require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/domain/infosync/FailPlacement"))
 }
 
-// SubTestDomain is batched in TestDomainSerial
-func SubTestDomain(t *testing.T) {
+func TestDomain(t *testing.T) {
 	store, err := mockstore.NewMockStore()
 	require.NoError(t, err)
 
diff --git a/domain/main_test.go b/domain/main_test.go
index 969d50e4a0f67..aaa108626c8f3 100644
--- a/domain/main_test.go
+++ b/domain/main_test.go
@@ -17,7 +17,6 @@ package domain_test
 import (
 	"testing"
 
-	. "github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/util/testbridge"
 	"go.uber.org/goleak"
 )
@@ -30,11 +29,3 @@ func TestMain(m *testing.M) {
 	}
 	goleak.VerifyTestMain(m, opts...)
 }
-
-// TestDomainSerial handles tests in serial
-func TestDomainSerial(t *testing.T) {
-	// these tests should run in serial for failpoint is global
-	t.Run("info", SubTestInfo)
-	t.Run("domain", SubTestDomain)
-	t.Run("domainSession", SubTestDomainSession)
-}
diff --git a/executor/executor_pkg_test.go b/executor/executor_pkg_test.go
index 51453e177b568..afe244bcf7a82 100644
--- a/executor/executor_pkg_test.go
+++ b/executor/executor_pkg_test.go
@@ -98,16 +98,7 @@ func (msm *mockSessionManager) SetServerID(serverID uint64) {
 	msm.serverID = serverID
 }
 
-func TestExecutorPkg(t *testing.T) {
-	t.Run("ShowProcessList", SubTestShowProcessList)
-	t.Run("BuildKvRangesForIndexJoinWithoutCwc", SubTestBuildKvRangesForIndexJoinWithoutCwc)
-	t.Run("GetFieldsFromLine", SubTestGetFieldsFromLine)
-	t.Run("SlowQueryRuntimeStats", SubTestSlowQueryRuntimeStats)
-	t.Run("AggPartialResultMapperB", SubTestAggPartialResultMapperB)
-	t.Run("FilterTemporaryTableKeys", SubTestFilterTemporaryTableKeys)
-}
-
-func SubTestShowProcessList(t *testing.T) {
+func TestShowProcessList(t *testing.T) {
 	// Compose schema.
 	names := []string{"Id", "User", "Host", "db", "Command", "Time", "State", "Info"}
 	ftypes := []byte{mysql.TypeLonglong, mysql.TypeVarchar, mysql.TypeVarchar,
@@ -180,7 +171,7 @@ func buildSchema(names []string, ftypes []byte) *expression.Schema {
 	return schema
 }
 
-func SubTestBuildKvRangesForIndexJoinWithoutCwc(t *testing.T) {
+func TestBuildKvRangesForIndexJoinWithoutCwc(t *testing.T) {
 	indexRanges := make([]*ranger.Range, 0, 6)
 	indexRanges = append(indexRanges, generateIndexRange(1, 1, 1, 1, 1))
 	indexRanges = append(indexRanges, generateIndexRange(1, 1, 2, 1, 1))
@@ -224,7 +215,7 @@ func generateDatumSlice(vals ...int64) []types.Datum {
 	return datums
 }
 
-func SubTestGetFieldsFromLine(t *testing.T) {
+func TestGetFieldsFromLine(t *testing.T) {
 	tests := []struct {
 		input    string
 		expected []string
@@ -282,7 +273,7 @@ func assertEqualStrings(t *testing.T, got []field, expect []string) {
 	}
 }
 
-func SubTestSlowQueryRuntimeStats(t *testing.T) {
+func TestSlowQueryRuntimeStats(t *testing.T) {
 	stats := &slowQueryRuntimeStats{
 		totalFileNum: 2,
 		readFileNum:  2,
@@ -300,7 +291,7 @@ func SubTestSlowQueryRuntimeStats(t *testing.T) {
 
 // Test whether the actual buckets in Golang Map is same with the estimated number.
 // The test relies the implement of Golang Map. ref https://github.com/golang/go/blob/go1.13/src/runtime/map.go#L114
-func SubTestAggPartialResultMapperB(t *testing.T) {
+func TestAggPartialResultMapperB(t *testing.T) {
 	if runtime.Version() < `go1.13` {
 		t.Skip("Unsupported version")
 	}
@@ -392,7 +383,7 @@ func getGrowing(m aggPartialResultMapper) bool {
 	return value.oldbuckets != nil
 }
 
-func SubTestFilterTemporaryTableKeys(t *testing.T) {
+func TestFilterTemporaryTableKeys(t *testing.T) {
 	vars := variable.NewSessionVars()
 	const tableID int64 = 3
 	vars.TxnCtx = &variable.TransactionContext{