diff --git a/migrator/migrator.go b/migrator/migrator.go
index 18b2593d..a98f7fe3 100644
--- a/migrator/migrator.go
+++ b/migrator/migrator.go
@@ -24,6 +24,10 @@ type Config struct {
 	gorm.Dialector
 }
 
+type GormDataTypeInterface interface {
+	GormDBDataType(*gorm.DB, *schema.Field) string
+}
+
 func (m Migrator) RunWithValue(value interface{}, fc func(*gorm.Statement) error) error {
 	stmt := &gorm.Statement{DB: m.DB}
 	if m.DB.Statement != nil {
@@ -44,6 +48,13 @@ func (m Migrator) DataTypeOf(field *schema.Field) string {
 		return field.DBDataType
 	}
 
+	fieldValue := reflect.New(field.IndirectFieldType)
+	if dataTyper, ok := fieldValue.Interface().(GormDataTypeInterface); ok {
+		if dataType := dataTyper.GormDBDataType(m.DB, field); dataType != "" {
+			return dataType
+		}
+	}
+
 	return m.Dialector.DataTypeOf(field)
 }
 
diff --git a/schema/field.go b/schema/field.go
index 854ec520..e0d49e2f 100644
--- a/schema/field.go
+++ b/schema/field.go
@@ -220,6 +220,10 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 		}
 	}
 
+	if dataTyper, ok := fieldValue.Interface().(GormDataTypeInterface); ok {
+		field.DataType = DataType(dataTyper.GormDataType())
+	}
+
 	if v, ok := field.TagSettings["AUTOCREATETIME"]; ok || (field.Name == "CreatedAt" && (field.DataType == Time || field.DataType == Int || field.DataType == Uint)) {
 		if strings.ToUpper(v) == "NANO" {
 			field.AutoCreateTime = UnixNanosecond
diff --git a/schema/interfaces.go b/schema/interfaces.go
new file mode 100644
index 00000000..f5d07843
--- /dev/null
+++ b/schema/interfaces.go
@@ -0,0 +1,23 @@
+package schema
+
+import "gorm.io/gorm/clause"
+
+type GormDataTypeInterface interface {
+	GormDataType() string
+}
+
+type CreateClausesInterface interface {
+	CreateClauses() []clause.Interface
+}
+
+type QueryClausesInterface interface {
+	QueryClauses() []clause.Interface
+}
+
+type UpdateClausesInterface interface {
+	UpdateClauses() []clause.Interface
+}
+
+type DeleteClausesInterface interface {
+	DeleteClauses() []clause.Interface
+}
diff --git a/schema/schema.go b/schema/schema.go
index d2c4d08b..5b360f5e 100644
--- a/schema/schema.go
+++ b/schema/schema.go
@@ -42,22 +42,6 @@ type Schema struct {
 	cacheStore                *sync.Map
 }
 
-type CreateClausesInterface interface {
-	CreateClauses() []clause.Interface
-}
-
-type QueryClausesInterface interface {
-	QueryClauses() []clause.Interface
-}
-
-type UpdateClausesInterface interface {
-	UpdateClauses() []clause.Interface
-}
-
-type DeleteClausesInterface interface {
-	DeleteClauses() []clause.Interface
-}
-
 func (schema Schema) String() string {
 	if schema.ModelType.Name() == "" {
 		return fmt.Sprintf("%v(%v)", schema.Name, schema.Table)
diff --git a/tests/tests_all.sh b/tests/tests_all.sh
index 92a28f3b..affb1847 100755
--- a/tests/tests_all.sh
+++ b/tests/tests_all.sh
@@ -17,14 +17,21 @@ for dialect in "${dialects[@]}" ; do
 
     if [ "$GORM_VERBOSE" = "" ]
     then
-      DEBUG=false GORM_DIALECT=${dialect} go test $race -count=1 ./...
-      cd tests
-      DEBUG=false GORM_DIALECT=${dialect} go test $race -count=1 ./...
+      GORM_DIALECT=${dialect} go test $race -count=1 ./...
+      if [ -d tests ]
+      then
+        cd tests
+        GORM_DIALECT=${dialect} go test $race -count=1 ./...
+        cd ..
+      fi
     else
-      DEBUG=false GORM_DIALECT=${dialect} go test $race -count=1 -v ./...
-      cd tests
-      DEBUG=false GORM_DIALECT=${dialect} go test $race -count=1 -v ./...
+      GORM_DIALECT=${dialect} go test $race -count=1 -v ./...
+      if [ -d tests ]
+      then
+        cd tests
+        GORM_DIALECT=${dialect} go test $race -count=1 -v ./...
+        cd ..
+      fi
     fi
-    cd ..
   fi
 done