In either the Regression Test Editor or "edit-only" Regression Test Editor, you may save a test to file, allowing you to open it again to modify the contents and rerun the algorithms. Tests are saved with the extension ".desr". To save a test, press Ctrl+S or select the File | Save menu option. The File | Save As menu option is also available for saving tests to a different name.
The editor's window title displays the test name if one has been saved and "*.desr" if it is a new test. The "*" symbol will appear after a saved test's name in the window title if the test has been modified without saving. In this case, if you close the window or DESpot's Main Window, a close confirmation dialog will appear prompting you if the test should be closed without saving, saved before closing, or the close operation should be cancelled.
Tests may be saved recursively, i.e. test1.desr contains test2.desr and visa versa, however test3.desr may not contain test3.desr, this will cause an error message when attempting to save.