support CRLs with no revoked certificates
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 2f49047..9e8eb38 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -304,6 +304,7 @@
   an unsupported reason code.
 * ``crl_inval_cert_issuer_entry_ext.pem`` - Contains a CRL with one revocation
   which has one entry extension for certificate issuer with an empty value.
+* ``crl_empty.pem`` - Contains a CRL with no revoked certificates.
 
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