test-proguard.optimized-build.gradle

android {
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        
        // Custom build type, just for running instrumentation tests!!!
        instrum {
            // "Inherit" from 'release' buildType
            initWith release
            // For deps that don't know what 'instrum' is
            matchingFallbacks = ['release']
            // Apply additional, instrumentation-related rules
            proguardFiles 'proguard-rules-instrum.pro' 
        }
    }
    // ...
}