for _, tc := range testcases {
		t.Run(fmt.Sprint(tc.usages), func(t *testing.T) {
			ku, eku, err := keyUsagesFromStrings(tc.usages)

			if tc.expectErr {
				if err == nil {
					t.Errorf("did not return an error, but expected one")
				}
				return
			}

			if err != nil {
				t.Errorf("unexpected error: %v", err)
			}

			if ku != tc.expectedKeyUsage || !reflect.DeepEqual(eku, tc.expectedExtKeyUsage) {

			return fmt.Errorf("unexpected value for 'ExtKeyUsage' field: want %v but got %v", eku, cert.ExtKeyUsage)
		}

		if ku := expectedFields.KeyUsage; ku != cert.KeyUsage {
			return fmt.Errorf("unexpected value for 'KeyUsage' field: want %v but got %v", ku, cert.KeyUsage)
		}

		if isCA := expectedFields.IsCA; isCA != cert.IsCA {

			},
			selfSigned: true,
			macosErr:   "x509: “valid.testing.golang.invalid” certificate is not trusted",
			windowsErr: "x509: certificate signed by unknown authority",
		},
		{
			name: "non-specified KU",
			cert: &Certificate{
				SerialNumber: big.NewInt(1),
				DNSNames:     []string{"valid.testing.golang.invalid"},
				NotBefore:    now.Add(-time.Hour),
				NotAfter:     now.Add(time.Hour),

it: italiano
iu: ᐃᓄᒃᑎᑐᑦ
ja: 日本語
jv: basa Jawa
ka: ქართული
kg: Kikongo
ki: Gĩkũyũ
kj: Kuanyama
kk: қазақ тілі
kl: kalaallisut
km: ខេមរភាសា
kn: ಕನ್ನಡ
ko: 한국어
kr: Kanuri
ks: कश्मीरी
ku: Kurdî
kv: коми кыв
kw: Kernewek
ky: Кыргызча
la: latine
lb: Lëtzebuergesch
lg: Luganda
li: Limburgs
ln: Lingála
lo: ພາສາ
lt: lietuvių kalba
lu: Tshiluba
lv: latviešu valoda
mg: fiteny malagasy

00000060  d1 56 18 67 59 a5 e1 ed  99 0f ca e5 6b 5f e3 d9  |.V.gY.......k_..|
00000070  e3 fd e6 a2 50 93 bf 87  85 60 e7 7f 0b a0 96 c4  |....P....`......|
00000080  29 55 63 de fe 6b 75 99  b2 a6 75 92 61 d0 96 19  |)Uc..ku...u.a...|
00000090  f5 60 8f ec e9 d3 98 4a  b9 6b 98 26 c1 3e 27 7e  |.`.....J.k.&.>'~|
000000a0  17 03 03 00 17 5a aa bb  35 67 ec 83 da 8e 85 bd  |.....Z..5g......|

00000150  00 23 03 81 86 00 04 00  c4 a1 ed be 98 f9 0b 48  |.#.............H|
00000160  73 36 7e c3 16 56 11 22  f2 3d 53 c3 3b 4d 21 3d  |s6~..V.".=S.;M!=|
00000170  cd 6b 75 e6 f6 b0 dc 9a  df 26 c1 bc b2 87 f0 72  |.ku......&.....r|
00000180  32 7c b3 64 2f 1c 90 bc  ea 68 23 10 7e fe e3 25  |2|.d/....h#.~..%|
00000190  c0 48 3a 69 e0 28 6d d3  37 00 ef 04 62 dd 0d a0  |.H:i.(m.7...b...|

00000080  10 bc 0f 71 93 9d e8 c4  e3 f6 a9 14 03 03 00 01  |...q............|
00000090  01 16 03 03 00 40 b7 75  28 6e 6b 9a 60 8f fc 5b  |.....@.u(nk.`..[|
000000a0  91 0a 16 54 ec b1 4b 55  b8 b2 5c 53 48 92 aa dc  |...T..KU..\SH...|
000000b0  55 64 2c b0 dc 77 b4 6f  7a a9 23 9c 44 8b 74 64  |Ud,..w.oz.#.D.td|
000000c0  c5 28 ea c7 8d 97 9b c8  a3 ec 11 d7 93 81 08 20  |.(............. |
000000d0  9c 2f 79 32 92 45                                 |./y2.E|

00000150  00 23 03 81 86 00 04 00  c4 a1 ed be 98 f9 0b 48  |.#.............H|
00000160  73 36 7e c3 16 56 11 22  f2 3d 53 c3 3b 4d 21 3d  |s6~..V.".=S.;M!=|
00000170  cd 6b 75 e6 f6 b0 dc 9a  df 26 c1 bc b2 87 f0 72  |.ku......&.....r|
00000180  32 7c b3 64 2f 1c 90 bc  ea 68 23 10 7e fe e3 25  |2|.d/....h#.~..%|
00000190  c0 48 3a 69 e0 28 6d d3  37 00 ef 04 62 dd 0d a0  |.H:i.(m.7...b...|

00000150  00 23 03 81 86 00 04 00  c4 a1 ed be 98 f9 0b 48  |.#.............H|
00000160  73 36 7e c3 16 56 11 22  f2 3d 53 c3 3b 4d 21 3d  |s6~..V.".=S.;M!=|
00000170  cd 6b 75 e6 f6 b0 dc 9a  df 26 c1 bc b2 87 f0 72  |.ku......&.....r|
00000180  32 7c b3 64 2f 1c 90 bc  ea 68 23 10 7e fe e3 25  |2|.d/....h#.~..%|
00000190  c0 48 3a 69 e0 28 6d d3  37 00 ef 04 62 dd 0d a0  |.H:i.(m.7...b...|

00000150  00 23 03 81 86 00 04 00  c4 a1 ed be 98 f9 0b 48  |.#.............H|
00000160  73 36 7e c3 16 56 11 22  f2 3d 53 c3 3b 4d 21 3d  |s6~..V.".=S.;M!=|
00000170  cd 6b 75 e6 f6 b0 dc 9a  df 26 c1 bc b2 87 f0 72  |.ku......&.....r|
00000180  32 7c b3 64 2f 1c 90 bc  ea 68 23 10 7e fe e3 25  |2|.d/....h#.~..%|
00000190  c0 48 3a 69 e0 28 6d d3  37 00 ef 04 62 dd 0d a0  |.H:i.(m.7...b...|