diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -355,15 +355,15 @@
 bookmsgmap = {
     b'update': (
         _(b"updating bookmark %s\n"),
-        _(b'updating bookmark %s failed!\n'),
+        _(b'updating bookmark %s failed\n'),
     ),
     b'export': (
         _(b"exporting bookmark %s\n"),
-        _(b'exporting bookmark %s failed!\n'),
+        _(b'exporting bookmark %s failed\n'),
     ),
     b'delete': (
         _(b"deleting remote bookmark %s\n"),
-        _(b'deleting remote bookmark %s failed!\n'),
+        _(b'deleting remote bookmark %s failed\n'),
     ),
 }
 
diff --git a/tests/test-bookmarks-pushpull.t b/tests/test-bookmarks-pushpull.t
--- a/tests/test-bookmarks-pushpull.t
+++ b/tests/test-bookmarks-pushpull.t
@@ -1166,7 +1166,7 @@
   searching for changes
   no changes found
   pushkey-abort: prepushkey hook exited with status 1
-  abort: exporting bookmark @ failed!
+  abort: exporting bookmark @ failed
   [255]
 
 #endif
@@ -1194,7 +1194,7 @@
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
-  abort: exporting bookmark @ failed!
+  abort: exporting bookmark @ failed
   [255]
 
   $ hg -R ../issue4455-dest/ bookmarks
@@ -1205,7 +1205,7 @@
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
-  exporting bookmark @ failed!
+  exporting bookmark @ failed
   [1]
 
 #endif
@@ -1233,7 +1233,7 @@
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
-  abort: exporting bookmark @ failed!
+  abort: exporting bookmark @ failed
   [255]
 
   $ hg -R ../issue4455-dest/ bookmarks
@@ -1244,7 +1244,7 @@
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
-  exporting bookmark @ failed!
+  exporting bookmark @ failed
   [1]
 
 #endif
@@ -1324,7 +1324,7 @@
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey.no-bm-move hook exited with status 1
-  abort: updating bookmark foo failed!
+  abort: updating bookmark foo failed
   [255]
 #endif
 #if b2-binary