diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1134,7 +1134,6 @@
                 raise error.ProgrammingError('transaction requires locking')
         tr = self.currenttransaction()
         if tr is not None:
-            scmutil.registersummarycallback(self, tr, desc)
             return tr.nest()
 
         # abort here if the journal already exists
diff --git a/tests/test-transplant.t b/tests/test-transplant.t
--- a/tests/test-transplant.t
+++ b/tests/test-transplant.t
@@ -354,7 +354,6 @@
   added 1 changesets with 1 changes to 1 files
   applying a53251cdf717
   a53251cdf717 transplanted to 8d9279348abb
-  new changesets 37a1297eb21b:8d9279348abb
   $ hg log --template '{rev} {parents} {desc}\n'
   2  b3
   1  b1
@@ -560,7 +559,6 @@
   added 2 changesets with 2 changes to 2 files
   applying a53251cdf717
   4:a53251cdf717 merged at 4831f4dc831a
-  new changesets 722f4667af76:4831f4dc831a
 
 test interactive transplant