Unable to merge dex error when using Mockito as androidTestImplementation

Android Studio: 3.0 Gradle plugin: 3.0.0 Mockito: 2.11.0

I encounter the following issue when trying to use Mockito in instrumented unit tests (connectedAndroidTest):

Error:Execution failed for task ‘:twinkle:transformDexArchiveWithExternalLibsDexMergerForDebugAndroidTest’. java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

I have the following test dependencies in build.gradle:

testImplementation 'junit:junit:4.12'
testImplementation 'org.robolectric:robolectric:3.5.1'
testImplementation 'org.mockito:mockito-core:2.11.0'

androidTestImplementation 'com.android.support:support-annotations:27.0.0'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test:rules:1.0.1'
androidTestImplementation 'org.mockito:mockito-core:2.11.0'

androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.1', {
    exclude group: 'com.android.support', module: 'support-annotations'
})

Has anyone else had this issue? I have also included the linkedin dexmaker for mockito to attempt to remedy the issue, to no avail. Any help on this would be greatly appreciated!

[marcosalis]

Just my two cents. In my case adding multiDexEnabled true worked, but I had to add it to all the modules which the application was made of, not only the application module.

[AhmadSadiq0]

Paste this in app.gradle below defaultConfig{}.It worked for me

compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 }