Display device and testing method thereof

The present invention provides a display apparatus and its test method for examining the defects of the organic layer constituting the overflow bag film. Display device according to one embodiment of the present invention covers the substrate, the display region including a pad region including a plurality of pads formed on the outskirts of the display area and display area, the pixels are arranged at least one inorganic film and an organic film disposed between disposed between the seal film including a display region and a pad region of the dam, and the dam and the pad area is provided with the other conductive lines or an electrically conductive electrode and scan lines which are not connected to the arrangement on the substrate.