diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index ad945f2..4abf9f6 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -278,7 +278,7 @@
   request using RSA and SHA1 with a subject alternative name extension
   generated using OpenSSL.
 * ``two_basic_constraints.pem`` - A certificate signing request
-  for a RSA 2048 bit key containing two basic constraints extensions.
+  for an RSA 2048 bit key containing two basic constraints extensions.
 * ``unsupported_extension.pem`` - A certificate signing request
   for an RSA 2048 bit key containing containing an unsupported
   extension type. The OID was encoded as "1.2.3.4" with an
@@ -287,9 +287,11 @@
   request for an RSA 2048 bit key containing containing an unsupported
   extension type marked critical. The OID was encoded as "1.2.3.4"
   with an ``extnValue`` of "value".
-* ``basic_constraints.pem`` - A certificate signing request for a RSA
+* ``basic_constraints.pem`` - A certificate signing request for an RSA
   2048 bit key containing a basic constraints extension marked as
   critical.
+* ``invalid_signature.pem`` - A certificate signing request for an RSA
+  1024 bit key containing an invalid signature with correct padding.
 
 Custom X.509 Certificate Revocation List Vectors
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~