java.lang.Exception: Custom runner class AndroidJUnit4 should have a public constructor with signature AndroidJUnit4(Class testClass)

Question

gradle looks like:

apply plugin: \'com.android.application\'

android {
    compileSdkVersion 25
    buildToolsVersion \"25.0.2\"

    defaultConfig {
              


        

Answer 1

I had the same problem. I'm working in Android studio 2.3.1. I checked my run configurations. Under Run->Edit Configurations and discovered the test I was trying to run as an instrumented test was under the Android JUnit tests category, even though I had it in the androidTest directory in my project. I added an Android Instrumented Test (hit the plus button in the corner) and set it to point to the test I was trying to run. That fixed it for me.