diff --git a/hgext/largefiles/__init__.py b/hgext/largefiles/__init__.py
--- a/hgext/largefiles/__init__.py
+++ b/hgext/largefiles/__init__.py
@@ -193,7 +193,7 @@ def _uisetup(ui):
         if name == b'rebase':
             # TODO: teach exthelper to handle this
             extensions.wrapfunction(
-                module, b'rebase', overrides.overriderebasecmd
+                module, 'rebase', overrides.overriderebasecmd
             )
 
 
diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -485,10 +485,10 @@ def overridelog(orig, ui, repo, *pats, *
         return lambda ctx: match
 
     wrappedmatchandpats = extensions.wrappedfunction(
-        scmutil, b'matchandpats', overridematchandpats
+        scmutil, 'matchandpats', overridematchandpats
     )
     wrappedmakefilematcher = extensions.wrappedfunction(
-        logcmdutil, b'_makenofollowfilematcher', overridemakefilematcher
+        logcmdutil, '_makenofollowfilematcher', overridemakefilematcher
     )
     with wrappedmatchandpats, wrappedmakefilematcher:
         return orig(ui, repo, *pats, **opts)
@@ -793,7 +793,7 @@ def overridecopy(orig, ui, repo, pats, o
         match = orig(ctx, pats, opts, globbed, default, badfn=badfn)
         return composenormalfilematcher(match, manifest)
 
-    with extensions.wrappedfunction(scmutil, b'match', normalfilesmatchfn):
+    with extensions.wrappedfunction(scmutil, 'match', normalfilesmatchfn):
         try:
             result = orig(ui, repo, pats, opts, rename)
         except error.Abort as e:
@@ -887,8 +887,8 @@ def overridecopy(orig, ui, repo, pats, o
             copiedfiles.append((src, dest))
             orig(src, dest, *args, **kwargs)
 
-        with extensions.wrappedfunction(util, b'copyfile', overridecopyfile):
-            with extensions.wrappedfunction(scmutil, b'match', overridematch):
+        with extensions.wrappedfunction(util, 'copyfile', overridecopyfile):
+            with extensions.wrappedfunction(scmutil, 'match', overridematch):
                 result += orig(ui, repo, listpats, opts, rename)
 
         lfdirstate = lfutil.openlfdirstate(ui, repo)
@@ -999,7 +999,7 @@ def overriderevert(orig, ui, repo, ctx, 
             m.matchfn = matchfn
             return m
 
-        with extensions.wrappedfunction(scmutil, b'match', overridematch):
+        with extensions.wrappedfunction(scmutil, 'match', overridematch):
             orig(ui, repo, ctx, *pats, **opts)
 
         newstandins = lfutil.getstandinsstate(repo)
diff --git a/hgext/narrow/narrowcommands.py b/hgext/narrow/narrowcommands.py
--- a/hgext/narrow/narrowcommands.py
+++ b/hgext/narrow/narrowcommands.py
@@ -128,7 +128,7 @@ def clonenarrowcmd(orig, ui, repo, *args
                 kwargs[b'depth'] = opts[b'depth']
 
         wrappedextraprepare = extensions.wrappedfunction(
-            exchange, b'_pullbundle2extraprepare', pullbundle2extraprepare_widen
+            exchange, '_pullbundle2extraprepare', pullbundle2extraprepare_widen
         )
 
     with wrappedextraprepare:
@@ -146,7 +146,7 @@ def pullnarrowcmd(orig, ui, repo, *args,
                 kwargs[b'depth'] = opts['depth']
 
         wrappedextraprepare = extensions.wrappedfunction(
-            exchange, b'_pullbundle2extraprepare', pullbundle2extraprepare_widen
+            exchange, '_pullbundle2extraprepare', pullbundle2extraprepare_widen
         )
 
     with wrappedextraprepare:
@@ -201,7 +201,7 @@ def pullbundle2extraprepare(orig, pullop
 
 
 extensions.wrapfunction(
-    exchange, b'_pullbundle2extraprepare', pullbundle2extraprepare
+    exchange, '_pullbundle2extraprepare', pullbundle2extraprepare
 )
 
 
@@ -366,7 +366,7 @@ def _widen(
         kwargs[b'excludepats'] = newexcludes
 
     wrappedextraprepare = extensions.wrappedfunction(
-        exchange, b'_pullbundle2extraprepare', pullbundle2extraprepare_widen
+        exchange, '_pullbundle2extraprepare', pullbundle2extraprepare_widen
     )
 
     # define a function that narrowbundle2 can call after creating the
diff --git a/hgext/narrow/narrowwirepeer.py b/hgext/narrow/narrowwirepeer.py
--- a/hgext/narrow/narrowwirepeer.py
+++ b/hgext/narrow/narrowwirepeer.py
@@ -36,7 +36,7 @@ def reposetup(repo):
                 kwargs["excludepats"] = b','.join(exclude)
             return orig(cmd, *args, **kwargs)
 
-        extensions.wrapfunction(peer, b'_calltwowaystream', wrapped)
+        extensions.wrapfunction(peer, '_calltwowaystream', wrapped)
 
     hg.wirepeersetupfuncs.append(wirereposetup)