Error:Execution failed for task ':app:transformClassesWithMultidexlistForDebugAndroidTest'

Question

I am not able to figure out why this error is coming
Here is full error

 Error:Execution failed for task          
 ':app:transformClassesWithMultidexlistForDebugAndroidTest'.
 > java.io.IOException: The output jar is empty. Did you specify the proper       
  '-keep' options?

My gradle android project was not having "androidTest" so I created manually and test folder here is screenshot of folder structure

Answer 1

I would not consider it as perfect answer but this is what i did.
I removed testInstrumentationRunner="android.support.test.runner....." from build.gradle file and restarted
It starts working :)
It is just for information