DisableInitializationCheck.cs

var fields = typeof(BaseUmbracoIndexer).GetFields(BindingFlags.NonPublic | BindingFlags.Static);
var disableInitializationCheckField = fields.SingleOrDefault(x => x.Name == "DisableInitializationCheck");
if (disableInitializationCheckField == null)
{
    Assert.Fail("Could Not Set DisableInitializationCheck");
}

disableInitializationCheckField.SetValue(null, true);