The present application proposes a display panel, including a display area and a non-display area surrounding the display area, wherein the display panel includes: a plurality of metal traces and a plurality of color resist blocks located in the display area; and a test key located in the non-display area, wherein the test key includes a plurality of color resist patterns and a plurality of metal patterns, each of the color resist patterns corresponds to a corresponding one of the color resist blocks, each of the metal patterns corresponds to one of the metal traces, and each of the color resist patterns is disposed correspondingly between adjacent ones of the metal patterns.