Test run failed: Instrumentation run failed due to 'java.lang.ClassNotFoundException'

Question

This is my first time setting up an Android test project to test a Android project.

I\'ve created a very basic test case which I\'m trying to get to run, however wh

Answer 1

I had upgraded to androidx libraries and started getting this error.

To fix it, in build.gradle I changed the line:

testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'

to

testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"