add wildcard SAN x509 test vector
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 3776cb1..744302e 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -102,6 +102,8 @@
tree.
* ``cryptography.io.pem`` - A leaf certificate issued by RapidSSL for the
cryptography website.
+* ``wildcard_san.pem`` - A leaf certificate issued by a public CA for
+ ``langui.sh`` that contains wildcard entries in the SAN extension.
Custom X.509 Vectors
~~~~~~~~~~~~~~~~~~~~