"a",
			time.Date(2021, 4, 19, 12, 29, 56, 0, timeZone(-7*time.Hour)).UTC(),
		},
		{
			"a/b/c",
			time.Date(2021, 4, 19, 12, 29, 59, 0, timeZone(-7*time.Hour)).UTC(),
		},
	} {
		fi, err := fs.Stat(z, test.name)
		if err != nil {
			t.Errorf("%s: %v", test.name, err)
			continue
		}
		if got := fi.ModTime(); !got.Equal(test.want) {
			t.Errorf("%s: got modtime %v, want %v", test.name, got, test.want)