How to set up Mockito for Kotlin and Android

You need to add the following dependencies in your app's build.gradle:

dependencies {
    // ... more entries
    testCompile 'junit:junit:4.12'

    // required if you want to use Mockito for unit tests
    testImplementation 'org.mockito:mockito-core:2.24.5'
    // required if you want to use Mockito for Android tests
    androidTestImplementation 'org.mockito:mockito-android:2.24.5'
}

And click on sync

You may need another dependency:

androidTestCompile 'org.mockito:mockito-android:2.12.0'

Alternatively, you can try manually importing the annotations:

import static org.mockito.Mockito.*;

It could be that it didn't import properly and that's why it showed as an unresolved reference. Auto-import has its flaws