                     let numberOfContainerPlugins = Loader.shared.containerPlugins.count
                     let numberOfCorePlugins = Loader.shared.corePlugins.count
 
-                    Loader.shared.register(plugins: [StubContainerPlugin.self])
+                    Loader.shared.register(plugins: [StubUIContainerPlugin.self])
 
                     expect(Loader.shared.playbacks.count).to(equal(numberOfInitialPlaybacks))
                     expect(Loader.shared.containerPlugins.count).to(equal(numberOfContainerPlugins + 1))

                    let numberOfContainerPlugins = Loader.shared.containerPlugins.count
                    let numberOfCorePlugins = Loader.shared.corePlugins.count

                    Loader.shared.register(plugins: [StubCorePlugin.self])

                    expect(Loader.shared.playbacks.count).to(equal(numberOfInitialPlaybacks))
                    expect(Loader.shared.containerPlugins.count).to(equal(numberOfContainerPlugins))
                    expect(Loader.shared.corePlugins.count).to(equal(numberOfCorePlugins + 1))
                }
            }


            return "spinner"
        }
    }
    
    class StubCorePlugin: CorePlugin {
        override var pluginName: String {
            return "core"
        }
    }
}
