The SourceSet 'instrumentTest' is not recognized by the Android Gradle Plugin
Solution 1:
instrumentTest has been deprecated and does not work with modern Gradle versions - which you probably updated in your project when upgrading Android Studio.
Replace instrumentTest with androidTest and it'll work.
Solution 2:
Replace instrumentTest by androidTest as example below
android {
buildToolsVersion "27.0.3"
compileSdkVersion 24
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
assets.srcDirs = ['assets']
jniLibs.srcDirs = ['libs']
}
androidTest.setRoot('tests')
}
}
Solution 3:
Try change distributionUrl in you gradle/wrapper/gradle-wrapper.properties to last vesion:
distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
clean project and "Invalidate Cache/Restart" in File menu after this
Solution 4:
Try with the Android Studio 3.1.2 update, which has a fix for this bug: https://developer.android.com/studio/releases/index.html#3-1-0