Abstract: Device for testing electrical modules. At least one container is provided which includes openings through each of which one module can be inserted into the container so that the opening can be closed in a substantially sealing manner, with the container having at least one entrance which is connectable with an exit of an aggregate which in turn is suitable for the release of a medium having a selectable temperature and/or humidity content. The device permits the function testing of the module while temperature gradients are being run or while further tests are in progress.