A method and a system perform parallel software testing based on a normalized configuration. In some embodiments, a system includes a first hardware system having one or more hardware components to execute a first version of software. The system also includes a second hardware system having one or more hardware components to execute a second version of the software at approximately the same time as the one or more hardware components of the first hardware system are to execute the first version of the software. The one or more hardware components of the first hardware system are essentially equal to the one or more hardware components of the second hardware system.