1. A method for generating a portion of a test description for testing a graphical user interface (GUI) of a remote system under test, the method being operable to create a text label for a reference digital image utilized in the test description, the reference digital image comprising a group of pixels selected from and comprising a portion of a digital image of the GUI of the system under test and including at least one image object, the method comprising the step of using a computer processor to: search at least one of the reference image or the digital image of the GUI for a text string; identify whether the text string is a candidate text string based on at least one first criteria associated with the said text string; create a text label for the reference digital image based upon an identified candidate text string; and insert the text label corresponding to the image object into the test description.