Embodiments of the present invention provide a system for refreshing data within the testing environment by sanitizing production data. In particular, the system may process real-world data obtained in the production environment and automatically replace sensitive or confidential information with realistic substitute data, then provide the sanitized data to the systems within the low level testing environment. The system may account for differences in table schema amongst a plurality of disparate databases within the production environment and the low level environment, thereby allowing the system to provide sanitized data only to the extent that it is needed for testing purposes. Furthermore, the system selectively provides sanitized test data on an as-needed basis, removing the need to continuously generate testing data.