diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index f9f865e..0904891 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -154,6 +154,8 @@
 * ``alternate-rsa-sha1-oid.pem`` - A certificate from an
   `unknown signature OID`_ Mozilla bug that uses an alternate signature OID for
   RSA with SHA1.
+* ``badssl-sct.pem`` - A certificate with the certificate transparency signed
+  certificate timestamp extension.
 
 Custom X.509 Vectors
 ~~~~~~~~~~~~~~~~~~~~
diff --git a/docs/spelling_wordlist.txt b/docs/spelling_wordlist.txt
index 13d5e07..450e758 100644
--- a/docs/spelling_wordlist.txt
+++ b/docs/spelling_wordlist.txt
@@ -82,6 +82,7 @@
 syscall
 Tanja
 testability
+timestamp
 tunable
 Ubuntu
 unencrypted
diff --git a/vectors/cryptography_vectors/x509/badssl-sct.pem b/vectors/cryptography_vectors/x509/badssl-sct.pem
new file mode 100644
index 0000000..4ea0f2f
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/badssl-sct.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFGDCCBACgAwIBAgIQGkTSlT8/2bAURo/J1C2/STANBgkqhkiG9w0BAQsFADBC
+MQswCQYDVQQGEwJVUzEWMBQGA1UEChMNR2VvVHJ1c3QgSW5jLjEbMBkGA1UEAxMS
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+/2CVSndrOfEk0TG23U3AxPxTuW1CrbV8/q71FdIzSOciccfCFHpsKOo3St/qbLVy
+tH5aohbcabFXRNsKEqveww9HdFxBIuGa+RuT5q0iBikusbpJHAwnnqP7i/dAcgCs
+kgjZjFeEU4EFy+b+a1SYQCeFxxC7c3DvaRhBB0VVfPlkPz0sw6l865MaTIbRyoUC
+AwEAAaOCAiAwggIcMCoGA1UdEQQjMCGCH2ludmFsaWQtZXhwZWN0ZWQtc2N0LmJh
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+c3ltY2IuY29tL2dwLmNybDBvBgNVHSAEaDBmMGQGBmeBDAECATBaMCoGCCsGAQUF
+BwIBFh5odHRwczovL3d3dy5yYXBpZHNzbC5jb20vbGVnYWwwLAYIKwYBBQUHAgIw
+IAweaHR0cHM6Ly93d3cucmFwaWRzc2wuY29tL2xlZ2FsMB8GA1UdIwQYMBaAFJfC
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+Y29tL2dwLmNydDAPBgMrZU0ECDAGAgEBAgEBMIGKBgorBgEEAdZ5AgQCBHwEegB4
+AHYAp85KTmIH4K3e5f2qSx+GdodntdACpV1HMQ5+ZwqV6rIAAAFYb//OtAAABAMA
+RzBFAiEAuAOtNPb8Dyz/hKCG5dfPWvAKB2Jqf7OmRGTxlaRIRRECIC9hjVMbb0q4
+CmeyB+GPba3RBEpes4nvfGDCaFP5PR9tMA0GCSqGSIb3DQEBCwUAA4IBAQBIMHww
+vuW8XOBdxw0Mq0z3NFsAW2XvkcXtTGmB5savCpRJ6LN0ub6NJX+KiFmDo9voMDro
+YL7o9i+BrSAFo3hr8QNxLLJaXD54h8lJ0oCkzyZtzezM8p2PWsEjouePtdE0AIHn
+RK0SnKBk9w0b3CMSbzObc1Cu8ATqZnE51d7xurim7qTZMhJM2hi9HeLPLVdEBiuC
+zmYtNpRMMQqbQvvrXftAohq/W90rK42Ss8kYIf8FsVTa5VaqXW7lIh/3JmBNLZ1D
+Aw5rmaztWlYO64YS7z4am5d9h2rrF1rfgv9Mc3caxAUO3sJZDRyhYaj+7BUgv8HR
+otJHkjr2ASPp31Yf
+-----END CERTIFICATE-----
\ No newline at end of file