Do you have test bank accounts that show multiple sub accounts?

Yes. DirectID provides three test bank accounts which contain multiple accounts as follows:

• Bank: DagBank, username: directid.bank1, password: bank1) - contains two accounts (checking and savings)
• Bank: DagBank3, username: directid.bank3, password: bank3 - contains a number of accounts
• Bank: DagBank, username: directid.bank15, password: bank15 - contains two accounts (checking and savings)