Test running failed: Unable to find instrumentation info for: ComponentInfo{} — error trying to test in IntelliJ with Gradle

I had the same error when I tried adding multiDexEnabled true to build.gradle.

I’m adding my experience here, because this is one of the first Google hits when searching with the ... Unable to find ... ComponentInfo ... error message.

In my case adding testInstrumentationRunner like here did the trick:

...
android {
    ...
    defaultConfig {
        ...
        testInstrumentationRunner "com.android.test.runner.MultiDexTestRunner"
    }
}

(I have com.android.tools.build:gradle:1.5.0)