A tool for testing objects in a client-server environment. The tool receives a plurality of proposed modifications to a baseline set of objects stored in a repository collectively submitted by a plurality of members of a first group of users and a plurality of members of a second group of users. The tool registers each modification of the plurality of proposed modifications with a user identifier corresponding to the user proposing the modification. The tool receives instructions to test the baseline set of objects with modifications that correspond to the first group of users. The tool determines which of the baseline set of objects stored in the repository are subject to the modifications that correspond to the first group of users. The tool executes the baseline set of objects and incorporating the modifications that correspond to the first group of users.