diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 66f7198..90f812b 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -172,6 +172,8 @@
   (commonly known as OCSP Must-Staple).
 * ``unique-identifier.pem`` - A certificate containing
   a distinguished name with an ``x500UniqueIdentifier``.
+* ``utf8-dnsname.pem`` - A certificate containing non-ASCII characters in the
+  DNS name entries of the SAN extension.
 
 Custom X.509 Vectors
 ~~~~~~~~~~~~~~~~~~~~
diff --git a/vectors/cryptography_vectors/x509/utf8-dnsname.pem b/vectors/cryptography_vectors/x509/utf8-dnsname.pem
new file mode 100644
index 0000000..2a8214e
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/utf8-dnsname.pem
@@ -0,0 +1,41 @@
+-----BEGIN CERTIFICATE-----
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+l9h31VY=
+-----END CERTIFICATE-----