| Class | BaseLayerIsolator | A fixture for isolating BaseLayer. |
| Class | LayerFixture | Adapt a layer to a fixture. |
| Class | TestBaseLayer | Undocumented |
| Class | BaseTestCase | Both the Base layer tests, as well as the base Test Case |
| Class | MemcachedTestCase | Undocumented |
| Class | LibrarianTestCase | Undocumented |
| Class | LibrarianLayerTest | Undocumented |
| Class | LibrarianResetTestCase | Our page tests need to run multple tests without destroying |
| Class | LibrarianHideTestCase | Undocumented |
| Class | RabbitMQTestCase | Undocumented |
| Class | DatabaseTestCase | Undocumented |
| Class | LaunchpadTestCase | Undocumented |
| Class | FunctionalTestCase | Undocumented |
| Class | ZopelessTestCase | Undocumented |
| Class | LaunchpadFunctionalTestCase | Undocumented |
| Class | LaunchpadZopelessTestCase | Undocumented |
| Class | LaunchpadScriptTestCase | Undocumented |
| Class | LayerProcessControllerInvariantsTestCase | Undocumented |
| Class | LayerProcessControllerTestCase | Tests for the LayerProcessController. |
| Class | TestNameTestCase | Undocumented |