Android Instrumented Testing

Override production modules

Unlike unit tests, where you effectively call start Koin in each test class (i.e. startKoin or KoinTestExtension), in Instrumented tests Koin is started by your Application class.

For overriding production Koin modules, loadModules and unloadModules are often unsafe because the changes are not applied immediately. Instead,the recommended approach is to add a module of your overrides to modules used by startKoin in the application's Application class.

startKoin {

...

modules(productionModule, instrumentedTestModule)

...

}