In response to detecting a software build break during testing, a change to a particular file committed to the software build that caused the software build to break is identified. A record of the change to the particular file is added to a sensitivity database, the sensitivity database accumulating multiple records of changes to the files of the software build during development of the software build. A relative level of failure of the particular file from the files of the software build based on the record in comparison with the multiple records is calculated. A sensitivity rating of the particular file to cause breaks in the software build based on the relative level of failure of the particular file weighted by one or more factors is generated. The sensitivity rating is output to one or more integrated development environment interfaces with access to the particular file of the software build.