Embodiments of the invention are generally directed to a system and method for regression tests of graphical user interfaces. In one embodiment, a testing system receives the actual state and the target of a GUI under test. The testing system computes the difference between the actual state and the target state based, at least in part, on a weighting function. The computed difference is compared to a threshold value. In an embodiment, if the difference is within the threshold, then the system indicates that the GUI is valid.