The present disclosure is directed to systems, media, and methods of generating test authorization for financial transactions. One or more computing devices generate an initial data set corresponding to a financial transaction. Alterations to one or more fields of information included in the initial data set are made responsive to instructions received via a user interface. Responsive to the alterations, the one or more computing devices: convert the test data set into a binary file, deserialize the binary file, and generate a transaction file for the financial transaction based on the deserialized test data set.