UnitTestで@smallTestとかでフィルターする例

ExampleUnitTest.java

package com.example;

import android.test.suitebuilder.annotation.SmallTest;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

/**
 * To work on unit tests, switch the Test Artifact in the Build Variants view.
 */
@RunWith(MyRunner.class)
public class ExampleUnitTest {
    @Test
    @SmallTest
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
}

MyRunner.java

package com.example;

import android.test.suitebuilder.annotation.SmallTest;

import org.junit.runner.Description;
import org.junit.runner.notification.RunNotifier;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.InitializationError;

import java.lang.annotation.Annotation;

/**
 * Created by masui on 9/14/16.
 */

public class MyRunner extends BlockJUnit4ClassRunner {

    public MyRunner(Class<?> klass) throws InitializationError {
        super(klass);
    }

    @Override
    protected void runChild(FrameworkMethod method, RunNotifier notifier) {
        Description description = describeChild(method);
        for (Annotation annotation : description.getAnnotations()) {
            if(SmallTest.class.isInstance(annotation)){
                notifier.fireTestIgnored(description);
                return;
            }
        }
        super.runChild(method, notifier);
    }
}