add AKI vector
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index f6eecfe..bc7cd64 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -160,6 +160,9 @@
containing an inhibit any policy extension with the value 5.
* ``inhibit_any_policy_negative.pem`` - An RSA 2048 bit self-signed certificate
containing an inhibit any policy extension with the value -1.
+* ``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.
Custom X.509 Request Vectors
~~~~~~~~~~~~~~~~~~~~~~~~~~~~