LithoActivityTestRule error

test.java

import androidx.test.ext.junit.runners.AndroidJUnit4;
import com.facebook.litho.testing.espresso.LithoActivityTestRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)
public class CardFeedActivityTest {

  @Rule
  public LithoActivityTestRule<MyActivity> mActivity =
      new LithoActivityTestRule<>(MyActivity.class);

  @Test
  public void itWorks() {
    System.out.println("ok");
  }
}