}

  public void testSetDistinctValues_equalInstances() {
    assertThrows(
        IllegalArgumentException.class, () -> tester.setDistinctValues(String.class, "", ""));
  }

  public void testInstantiate_setDistinctValues() throws Exception {
    NotInstantiable x = new NotInstantiable();
    NotInstantiable y = new NotInstantiable();
    tester.setDistinctValues(NotInstantiable.class, x, y);