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".
diff --git a/vectors/cryptography_vectors/x509/custom/unsupported_extension_2.pem b/vectors/cryptography_vectors/x509/custom/unsupported_extension_2.pem
new file mode 100644
index 0000000..4b7d256
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/unsupported_extension_2.pem
@@ -0,0 +1,14 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----