diff --git a/tests/test-help.t b/tests/test-help.t
--- a/tests/test-help.t
+++ b/tests/test-help.t
@@ -1078,6 +1078,7 @@
        changegroups  Changegroups
        config        Config Registrar
        extensions    Extension API
+       mergestate    Mergestate
        requirements  Repository Requirements
        revlogs       Revision Logs
        wireprotocol  Wire Protocol
@@ -3425,6 +3426,13 @@
   Extension API
   </td></tr>
   <tr><td>
+  <a href="/help/internals.mergestate">
+  mergestate
+  </a>
+  </td><td>
+  Mergestate
+  </td></tr>
+  <tr><td>
   <a href="/help/internals.requirements">
   requirements
   </a>