DER conversion of PKCS1 rsa.pub.pem
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 718678b..3c27b5d 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -74,8 +74,9 @@
`OpenSSL example key`_ for RSA.
* DER conversions of `enc-rsa-pkcs8.pem`_, `enc2-rsa-pkcs8.pem`_, and
`unenc-rsa-pkcs8.pem`_.
-* ``asymmetric/public/PKCS1/rsa.pub.pem`` is a PKCS1 conversion of the public
- key from ``asymmetric/PKCS8/unenc-rsa-pkcs8.pem``.
+* ``asymmetric/public/PKCS1/rsa.pub.pem`` and
+ ``asymmetric/public/PKCS1/rsa.pub.der`` are PKCS1 conversions of the public
+ key from ``asymmetric/PKCS8/unenc-rsa-pkcs8.pem`` using PEM and DER encoding.
X.509
~~~~~