if n.UnixNano() == lastUpdatedAt.UnixNano() {
			t.Errorf("%v: user's updated at should be changed, but got %v, was %v", name, n, lastUpdatedAt)
		}
		lastUpdatedAt = n
	}

	checkOtherData := func(name string) {
		var first, last User
		if err := DB.Where("id = ?", users[0].ID).First(&first).Error; err != nil {
			t.Errorf("errors happened when query before user: %v", err)
		}