new unsupported extension x509 test vector
see #2288
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 70766d5..ad945f2 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -141,6 +141,10 @@
* ``unsupported_extension.pem`` - An RSA 2048 bit self-signed certificate
containing an unsupported extension type. The OID was encoded as
"1.2.3.4" with an ``extnValue`` of "value".
+* ``unsupported_extension_2.pem`` - A ``secp256r1`` certificate
+ containing two unsupported extensions. The OIDs are ``1.3.6.1.4.1.41482.2``
+ with an ``extnValue`` of ``1.3.6.1.4.1.41482.1.2`` and
+ ``1.3.6.1.4.1.45724.2.1.1`` with an ``extnValue`` of ``\x03\x02\x040``
* ``unsupported_extension_critical.pem`` - An RSA 2048 bit self-signed
certificate containing an unsupported extension type marked critical. The OID
was encoded as "1.2.3.4" with an ``extnValue`` of "value".