docfix
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 090909b..9cf7a42 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -239,7 +239,7 @@
* ``crl_all_reasons.pem`` - Contains a CRL with 12 revoked certificates, whose
serials match their list position. It includes one revocation without
- any entry extensions, 10 revocations with every supported reason code and one
+ any entry extensions, 10 revocations with every supported reason code and one
revocation with an unsupported, non-critical entry extension with the OID
value set to "1.2.3.4".
* ``crl_dup_entry_ext.pem`` - Contains a CRL with one revocation which has a