That's a requirement of your software. Your software should meet the minimums standards required by your target user. That's the "viable" part of Minimum Viab

That's a requirement of your software. Your software should meet the minimums standards required by your target user. That's the "viable" part of Minimum Viable Product. In a similar vein, you cannot release a new antivirus product that does not detect viruses, or security product that does not make things more secure. Software development has (or should have) defined priorities - and if accurate financial transaction processing is a base requirement then that's the minimum viable product you need to deliver. And if it takes tests to do that, then that's what you need.