def METHOD_NAME(self):
    self.assertIn(date(2021, 1, 1), self.holidays)
    self.assertIn(date(2021, 2, 12), self.holidays)
    self.assertIn(date(2021, 2, 13), self.holidays)
    self.assertIn(date(2021, 4, 2), self.holidays)
    self.assertIn(date(2021, 5, 1), self.holidays)
    self.assertIn(date(2021, 5, 13), self.holidays)
    self.assertIn(date(2021, 5, 26), self.holidays)
    self.assertIn(date(2021, 7, 20), self.holidays)
    self.assertIn(date(2021, 8, 9), self.holidays)
    self.assertIn(date(2021, 11, 4), self.holidays)
    self.assertIn(date(2021, 12, 25), self.holidays)
    self.assertEqual(len(Singapore(years=[2021])), 11)