--- a/tests/test-bookmarks-pushpull.t	Thu Feb 13 22:06:57 2020 -0500
+++ b/tests/test-bookmarks-pushpull.t	Thu Feb 13 22:51:17 2020 -0500
@@ -328,6 +328,17 @@
 
 #endif
 
+Divergent bookmark cannot be exported
+
+  $ hg book W@default
+  $ hg push -B W@default ../a
+  pushing to ../a
+  searching for changes
+  cannot push divergent bookmark W@default!
+  no changes found
+  [2]
+  $ hg book -d W@default
+
 export the active bookmark
 
   $ hg bookmark V