@Test
public void testAddKnownVariantFilter() {

    analysisBuilder.genomeAssembly(GenomeAssembly.HG19);
    analysisBuilder.frequencySources(EnumSet.allOf(FrequencySource.class));
    analysisBuilder.addKnownVariantFilter();
    assertThat(buildAndGetSteps(), equalTo(singletonList(new KnownVariantFilter())));
}