diff -r f7b61ad3c64a -r 7a93b7b3dc2d mercurial/testing/storage.py
--- a/mercurial/testing/storage.py	Wed Jan 27 01:43:17 2021 +0100
+++ b/mercurial/testing/storage.py	Wed Jan 27 02:34:51 2021 +0100
@@ -1129,12 +1129,13 @@
         with self._maketransactionfn() as tr:
             nodes = []
 
-            def onchangeset(cl, node):
+            def onchangeset(cl, rev):
+                node = cl.node(rev)
                 nodes.append(node)
                 cb(cl, node)
 
-            def ondupchangeset(cl, node):
-                nodes.append(node)
+            def ondupchangeset(cl, rev):
+                nodes.append(cl.node(rev))
 
             f.addgroup(
                 [],
@@ -1163,12 +1164,13 @@
         with self._maketransactionfn() as tr:
             nodes = []
 
-            def onchangeset(cl, node):
+            def onchangeset(cl, rev):
+                node = cl.node(rev)
                 nodes.append(node)
                 cb(cl, node)
 
-            def ondupchangeset(cl, node):
-                nodes.append(node)
+            def ondupchangeset(cl, rev):
+                nodes.append(cl.node(rev))
 
             f.addgroup(
                 deltas,
@@ -1217,8 +1219,8 @@
         with self._maketransactionfn() as tr:
             newnodes = []
 
-            def onchangeset(cl, node):
-                newnodes.append(node)
+            def onchangeset(cl, rev):
+                newnodes.append(cl.node(rev))
 
             f.addgroup(
                 deltas,