This feature is available in Ultimate edition only.
At the end of each sprint, new regression tests are typically generated from the list of acceptance tests attached to a story or defect. The team decides which tests should be promoted to a regression test.
Unattached regression tests can also be created new using the Add button on the page, the Add New... function in the left navigation area, or using the Excel import.
From the main menu, select Product > Regression Tests.
Click Add Regression Test.
Enter the required information, and then click Save.
Note that Regression tests can also be generated directly from acceptance tests for previous stories.