The present invention generally provides a semiconductor substrate having an extended test structure and a method of fabricating such a substrate. A method of forming an extended test structure on a semiconductor substrate, consistent with one embodiment of the invention, includes forming a first test structure pattern over a first portion of the substrate and forming a second test structure pattern of the second portion of the substrate which partially overlaps the first portion of the substrate such that the first test structure pattern and the second test structure overlap. The first test structure pattern may be formed using, for example, reticle and a second test structure pattern may be formed using the same reticle. The first and second test structure patterns may, for example, be formed in a scribe line of the substrate.