diff --git a/tests/test-narrow-widen-no-ellipsis.t b/tests/test-narrow-widen-no-ellipsis.t
--- a/tests/test-narrow-widen-no-ellipsis.t
+++ b/tests/test-narrow-widen-no-ellipsis.t
@@ -140,6 +140,17 @@
   $ hg id -n
   2
 
+Test that extending already included files should not call narrow_widen
+wireprotocol command
+
+  $ hg tracked --addinclude widest/f
+  comparing with ssh://user@dummy/master
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 0 changesets with 0 changes to 0 files
+
 Pull down the newly added upstream revision.
 
   $ hg pull