--- a/tests/test-help.t	Sun Nov 04 12:51:14 2018 +0900
+++ b/tests/test-help.t	Mon Nov 12 21:28:54 2018 +0900
@@ -1066,6 +1066,7 @@
        censor        Censor
        changegroups  Changegroups
        config        Config Registrar
+       extensions    Extension API
        requirements  Repository Requirements
        revlogs       Revision Logs
        wireprotocol  Wire Protocol
@@ -3404,6 +3405,13 @@
   Config Registrar
   </td></tr>
   <tr><td>
+  <a href="/help/internals.extensions">
+  extensions
+  </a>
+  </td><td>
+  Extension API
+  </td></tr>
+  <tr><td>
   <a href="/help/internals.requirements">
   requirements
   </a>