The TMS Test tool for Business Objects can be invoked using the SAP Transaction code: /n/SCMTMS/BO_TEST
Please do take note of the Disclaimer though:
This transaction is for SAP internal use only.
It is used by SAP support colleagues.
Do not use this transaction for business.
Incorrect handling may result in unwanted
manipulation of business data.
It doesn’t seem to be released for any productive use at the moment.