diff --git a/pkgs/shelf/test/ssl_certs.dart b/pkgs/shelf/test/ssl_certs.dart
index d5a36258..f305419f 100644
--- a/pkgs/shelf/test/ssl_certs.dart
+++ b/pkgs/shelf/test/ssl_certs.dart
@@ -4,96 +4,111 @@
 
 import 'dart:convert';
 
+// The certificates were taken from the Dart SDK at
+// `certChainBytes`: tests/standalone/io/certificates/untrusted_server_chain.pem
+// `certKeyBytes`: tests/standalone/io/certificates/untrusted_server_key.pem
+//
+// I tried to recreate these certificates using a modified version of the script
+// at tests/standalone/io/create_sample_certificates.sh but the
+// "PBE-SHA1-RC4-128" algorithm is no longer supported by openssl and replacing
+// it with "aes-256-cbc" causes the tests to fail with:
+//
+// HandshakeException: Handshake error in client (OS Error:
+// CERTIFICATE_VERIFY_FAILED:
+//                       ... application verification failure(handshake.cc:297))
+//
+// The current certificates will expire in 2030.
 List<int> certChainBytes = utf8.encode('''
 -----BEGIN CERTIFICATE-----
 MIIDZDCCAkygAwIBAgIBATANBgkqhkiG9w0BAQsFADAgMR4wHAYDVQQDDBVpbnRl
-cm1lZGlhdGVhdXRob3JpdHkwHhcNMTUxMDI3MTAyNjM1WhcNMjUxMDI0MTAyNjM1
+cm1lZGlhdGVhdXRob3JpdHkwHhcNMTgwNDIzMTcxNTEzWhcNMjgwNDIwMTcxNTEz
 WjAUMRIwEAYDVQQDDAlsb2NhbGhvc3QwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw
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-ATAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSvhJo6taTggJQBukEvMo/PDk8tKTAf
-BgNVHSMEGDAWgBS98L4T5RaIToE3DkBRsoeWPil0eDAOBgNVHQ8BAf8EBAMCA6gw
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-PkLkXmoIod8=
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+Wys+JpPMdKo=
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
 MIIDLjCCAhagAwIBAgIBAjANBgkqhkiG9w0BAQsFADAYMRYwFAYDVQQDDA1yb290
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+HuE=
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
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+ubk=
 -----END CERTIFICATE-----
 ''');
 
 List<int> certKeyBytes = utf8.encode('''
 -----BEGIN ENCRYPTED PRIVATE KEY-----
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+53fxqtdH3hTAUXqcOLzHnvLUENiABKMeJOtGTV9MFCxgGsnzgYNXnB9hDhm84+IX
+JQdMjj+BNFE6
 -----END ENCRYPTED PRIVATE KEY-----
 ''');