diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index bc7cd64..a170142 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -163,6 +163,9 @@
 * ``authority_key_identifier.pem`` - An RSA 2048 bit self-signed certificate
   containing an authority key identifier extension with key identifier,
   authority certificate issuer, and authority certificate serial number fields.
+* ``authority_key_identifier_no_keyid.pem`` - An RSA 2048 bit self-signed
+  certificate containing an authority key identifier extension with authority
+  certificate issuer and authority certificate serial number fields.
 
 Custom X.509 Request Vectors
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/vectors/cryptography_vectors/x509/custom/authority_key_identifier_no_keyid.pem b/vectors/cryptography_vectors/x509/custom/authority_key_identifier_no_keyid.pem
new file mode 100644
index 0000000..fffcc65
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/authority_key_identifier_no_keyid.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----