diff -r d6afa9c149c3 -r 59fa3890d40a mercurial/keepalive.py
--- a/mercurial/keepalive.py	Sun Dec 13 18:29:22 2020 -0800
+++ b/mercurial/keepalive.py	Tue Dec 01 21:54:46 2020 +0100
@@ -93,8 +93,8 @@
 
 from .i18n import _
 from .pycompat import getattr
+from .node import hex
 from . import (
-    node,
     pycompat,
     urllibcompat,
     util,
@@ -723,7 +723,7 @@
     foo = fo.read()
     fo.close()
     m = md5(foo)
-    print(format % (b'normal urllib', node.hex(m.digest())))
+    print(format % (b'normal urllib', hex(m.digest())))
 
     # now install the keepalive handler and try again
     opener = urlreq.buildopener(HTTPHandler())
@@ -733,7 +733,7 @@
     foo = fo.read()
     fo.close()
     m = md5(foo)
-    print(format % (b'keepalive read', node.hex(m.digest())))
+    print(format % (b'keepalive read', hex(m.digest())))
 
     fo = urlreq.urlopen(url)
     foo = b''
@@ -745,7 +745,7 @@
             break
     fo.close()
     m = md5(foo)
-    print(format % (b'keepalive readline', node.hex(m.digest())))
+    print(format % (b'keepalive readline', hex(m.digest())))
 
 
 def comp(N, url):