diff -r 2372284d9457 -r 687b865b95ad hgext/clonebundles.py
--- a/hgext/clonebundles.py	Sun Oct 06 09:45:02 2019 -0400
+++ b/hgext/clonebundles.py	Sun Oct 06 09:48:39 2019 -0400
@@ -201,7 +201,7 @@
     wireprotov1server,
 )
 
-testedwith = 'ships-with-hg-core'
+testedwith = b'ships-with-hg-core'
 
 
 def capabilities(orig, repo, proto):
@@ -210,11 +210,11 @@
     # Only advertise if a manifest exists. This does add some I/O to requests.
     # But this should be cheaper than a wasted network round trip due to
     # missing file.
-    if repo.vfs.exists('clonebundles.manifest'):
-        caps.append('clonebundles')
+    if repo.vfs.exists(b'clonebundles.manifest'):
+        caps.append(b'clonebundles')
 
     return caps
 
 
 def extsetup(ui):
-    extensions.wrapfunction(wireprotov1server, '_capabilities', capabilities)
+    extensions.wrapfunction(wireprotov1server, b'_capabilities', capabilities)