How to keep internal table column name lower case?

Is there a way to keep the column names for a internal table "lower case" when passing it to a "Call Transformation" to convert the data to json?  I really need the column names to be lower case since the js i'm using requires the keys to be lowercase to properly build out the structure.  When the transformation occurs it's making the column names uppercase.

CALL TRANSFORMATION id

         SOURCE test     = itest

         RESULT XML json_writer.

Here is the internal table.

TYPES:  BEGIN OF test,

                  id      TYPE string,

                  parent  TYPE string,

                  text    TYPE string,

              END OF test.

   DATA: wa_test     TYPE test,

              itest          TYPE STANDARD TABLE OF test.