diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 02cc122..257b151 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -192,6 +192,13 @@
 * ``cdp_reason_aa_compromise.pem`` - An RSA 1024 bit certificate containing a
   CRL distribution points extension with the ``AACompromise`` ``reasons`` bit
   set.
+* ``nc_permitted_excluded.pem`` - An RSA 2048 bit self-signed certificate
+  containing a name constraints extension with both permitted and excluded
+  elements.
+* ``nc_permitted.pem`` - An RSA 2048 bit self-signed certificate containing a
+  name constraints extension with permitted elements.
+* ``nc_excluded.pem`` - An RSA 2048 bit self-signed certificate containing a
+  name constraints extension with excluded elements.
 * ``cp_user_notice_with_notice_reference.pem`` - An RSA 2048 bit self-signed
   certificate containing a certificate policies extension with a
   notice reference in the user notice.
diff --git a/vectors/cryptography_vectors/x509/custom/nc_excluded.pem b/vectors/cryptography_vectors/x509/custom/nc_excluded.pem
new file mode 100644
index 0000000..69f416e
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/nc_excluded.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vectors/cryptography_vectors/x509/custom/nc_permitted.pem b/vectors/cryptography_vectors/x509/custom/nc_permitted.pem
new file mode 100644
index 0000000..a68096e
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/nc_permitted.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vectors/cryptography_vectors/x509/custom/nc_permitted_excluded.pem b/vectors/cryptography_vectors/x509/custom/nc_permitted_excluded.pem
new file mode 100644
index 0000000..726b3b8
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/nc_permitted_excluded.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----