According to one embodiment, data isolation is provided with respect to lifecycle phases of an application. For example, a test data isolation and a production data isolation of at least one resource are created. The test data isolation corresponds with a test lifecycle phase of the application and the production data isolation corresponds with a production lifecycle phase of the application. A first set of data is stored in the test data isolation and a second set of data is stored in the production data isolation. A test version of the application is executed in the test data isolation. A production version of the application is executed in the production data isolation. A particular executing version of the application is allowed to only access data according to a lifecycle phase selected for a user.