In this project, the omega test which was used to find exact array dependence information inside the loops is integrated to data flow type regression test in a hierarchical way. Conversional data flow type regression test either underestimates or overestimates the array dependencies. The omega test is used to prevent the overestimation in regression test by finding exact array dependencies inside the nested loop and eliminating false definition-use association. As a future work, if the hierarchical regression test with the omega test is implemented and compared with conversional data flow test with respect to which definition-uses pairs are retested and how many new definition-use pair is introduced and how many of them is false. By using this data, this theoretical work will be proved and proposed as a new regression testing.