--- a/tests/test-fncache.t	Mon Jun 22 09:59:48 2015 -0700
+++ b/tests/test-fncache.t	Sat Jun 20 20:11:53 2015 -0700
@@ -53,6 +53,23 @@
    warning: revlog 'data/a.i/b.i' not in fncache!
   3 files, 3 changesets, 3 total revisions
   3 warnings encountered!
+  hint: run "hg debugrebuildfncache" to recover from corrupt fncache
+
+Follow the hint to make sure it works
+
+  $ hg debugrebuildfncache
+  adding data/a.i
+  adding data/a.i.hg/c.i
+  adding data/a.i/b.i
+  3 items added, 0 removed from fncache
+
+  $ hg verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+  3 files, 3 changesets, 3 total revisions
+
   $ cd ..
 
 Non store repo: