In the build details window, click the Test Sessions tab to view the test sessions. Click the desired test session ID to open the details. For sessions with status Under Testing, a red Abort button will be present. Click on Abort to end the session.
Users will need view and edit permissions in the test coverage module to perform this action. Depending on the settings of a users project permissions, users may be able to view all project builds or just a subset of them. Project owners manage the permissions for project members.