Code block rating for guilty changelist identification and test script suggestion is discussed herein. An embodiment operates by assigning, by at least one processor, a respective code block rating to each code block of a plurality of code blocks; determining, by at least one processor, a change list rating for a change list, wherein the determining comprises: assigning, by at least one processor, a respective suspicious code block rating to each code block of the plurality of the code blocks modified by the change list, wherein the respective suspicious code block rating of a code block is based upon the respective code block rating of the code block, and calculating, by at least one processor, the change list rating based upon the respective code block ratings of each code block modified by the change list; and performing, by at least one processor, maintenance on the change list based upon the calculated change list rating.