--- a/tests/test-releasenotes-formatting.t	Tue Aug 22 16:16:39 2017 +0200
+++ b/tests/test-releasenotes-formatting.t	Sun Aug 13 19:58:45 2017 +0530
@@ -378,3 +378,32 @@
   
   * Adds a new feature.
 
+  $ cd ..
+
+Testing output for the --check (-c) flag
+
+  $ hg init check-flag
+  $ cd check-flag
+
+  $ touch a
+  $ hg -q commit -A -l - << EOF
+  > .. asf::
+  > 
+  >    First paragraph under this admonition.
+  > EOF
+
+Suggest similar admonition in place of the invalid one.
+
+  $ hg releasenotes -r . -c
+  Invalid admonition 'asf' present in changeset 4026fe9e1c20
+
+  $ touch b
+  $ hg -q commit -A -l - << EOF
+  > .. fixes::
+  > 
+  >    First paragraph under this admonition.
+  > EOF
+
+  $ hg releasenotes -r . -c
+  Invalid admonition 'fixes' present in changeset 0e7130d2705c
+  (did you mean fix?)