diff --git a/tests/tests_test.go b/tests/tests_test.go
index cb73d267..3db4eedf 100644
--- a/tests/tests_test.go
+++ b/tests/tests_test.go
@@ -38,6 +38,25 @@ func init() {
 			DB.Exec("PRAGMA foreign_keys = ON")
 		}
 	}
+	if DB, err = OpenTestConnection2(); err != nil {
+		log.Printf("failed to connect database, got error %v", err)
+		os.Exit(1)
+	} else {
+		sqlDB, err := DB.DB()
+		if err == nil {
+			err = sqlDB.Ping()
+		}
+
+		if err != nil {
+			log.Printf("failed to connect database, got error %v", err)
+		}
+
+		RunMigrations()
+		if DB.Dialector.Name() == "sqlite" {
+			DB.Exec("PRAGMA foreign_keys = ON")
+		}
+	}
+
 }
 
 func OpenTestConnection() (db *gorm.DB, err error) {
@@ -85,6 +104,51 @@ func OpenTestConnection() (db *gorm.DB, err error) {
 	return
 }
 
+func OpenTestConnection2() (db *gorm.DB, err error) {
+	dbDSN := os.Getenv("GORM_DSN")
+	switch os.Getenv("GORM_DIALECT") {
+	case "mysql":
+		log.Println("testing mysql...")
+		if dbDSN == "" {
+			dbDSN = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
+		}
+		db, err = gorm.OpenD(mysql.Open(dbDSN))
+	case "postgres":
+		log.Println("testing postgres...")
+		if dbDSN == "" {
+			dbDSN = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
+		}
+		db, err = gorm.OpenD(postgres.New(postgres.Config{
+			DSN:                  dbDSN,
+			PreferSimpleProtocol: true,
+		}))
+	case "sqlserver":
+		// CREATE LOGIN gorm WITH PASSWORD = 'LoremIpsum86';
+		// CREATE DATABASE gorm;
+		// USE gorm;
+		// CREATE USER gorm FROM LOGIN gorm;
+		// sp_changedbowner 'gorm';
+		// npm install -g sql-cli
+		// mssql -u gorm -p LoremIpsum86 -d gorm -o 9930
+		log.Println("testing sqlserver...")
+		if dbDSN == "" {
+			dbDSN = "sqlserver://gorm:LoremIpsum86@localhost:9930?database=gorm"
+		}
+		db, err = gorm.OpenD(sqlserver.Open(dbDSN))
+	default:
+		log.Println("testing sqlite3...")
+		db, err = gorm.OpenD(sqlite.Open(filepath.Join(os.TempDir(), "gorm.db")))
+	}
+
+	if debug := os.Getenv("DEBUG"); debug == "true" {
+		db.Logger = db.Logger.LogMode(logger.Info)
+	} else if debug == "false" {
+		db.Logger = db.Logger.LogMode(logger.Silent)
+	}
+
+	return
+}
+
 func RunMigrations() {
 	var err error
 	allModels := []interface{}{&User{}, &Account{}, &Pet{}, &Company{}, &Toy{}, &Language{}}