@Test
public void loadInterstitial_shouldHaveEmptyServerExtrasOnInvalidJsonParams() throws Exception {

    subject = new CustomEventInterstitialAdapter(moPubInterstitial, CLASS_NAME, "{this is terrible JSON");
    subject.loadInterstitial();
    expectedLocalExtras.put("Ad-Configuration", null);
    verify(interstitial).loadInterstitial(
            any(Context.class),
            eq(subject),
            eq(expectedLocalExtras),
            eq(expectedServerExtras)
    );
}