Greg wants to implement a version control system to ensure that changes are made in ways that will not cause problems for his organization's critical software. Which of the following is not a common feature of version control systems designed for software source code?

Version control systems track versions but don't do testing themselves. Atomic operations ensure that actions like commits don't overwrite other commits in progress. File locking allows a developer to check out a file while it is being worked on, and tagging and labeling helps developers track files and versions.