add another policy constraints test vector
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index d62fb93..4d28419 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -263,6 +263,8 @@
policy constraints extension with a require explicit policy element.
* ``unsupported_subject_public_key_info.pem`` - A certificate whose public key
is an unknown OID (``1.3.6.1.4.1.8432.1.1.2``).
+* ``policy_constraints_explicit.pem`` - A self-signed certificate containing
+ a ``policyConstraints`` extension with a ``requireExplicitPolicy`` value.
Custom X.509 Request Vectors
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/vectors/cryptography_vectors/x509/custom/policy_constraints_explicit.pem b/vectors/cryptography_vectors/x509/custom/policy_constraints_explicit.pem
new file mode 100644
index 0000000..d6b5b29
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/custom/policy_constraints_explicit.pem
@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----