The invention relates to implementing a test data tool that generates test data based on production data patterns. According to an embodiment of the present invention, the test data tool comprises: a processor configured to: receive, via the data input, production data from the one or more production environments, the production data comprises personally identifiable information; identify a plurality of attributes from the production data; for each attribute, identify one or more data patterns; generate one or more rules that define the one or more data patterns for each attribute; generate a configuration file based on the one or more rules; apply the configuration file to generate test data in a manner that obscures personally identifiable information existing in the production data; and transmit the test data to a UAT environment.