4,
			time.Date(2020, time.March, 20, 0, 0, 0, 0, time.UTC),
		},
		{
			time.Date(2020, time.March, 15, 0, 0, 0, 0, time.UTC),
			1,
			time.Date(2020, time.March, 17, 0, 0, 0, 0, time.UTC),
		},
	}

	for i, tc := range testCases {
		t.Run(fmt.Sprintf("Test %d", i+1), func(t *testing.T) {
			got := ExpectedExpiryTime(tc.modTime, int(tc.days))
			if !got.Equal(tc.expected) {