diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 027b999..6586f84 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,21 +23,3 @@ jobs:
         run:
           pip install mercurial==${{ matrix.hg }}
       - run: make test
-  test-windows:
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-        with:
-          python-version: '3.10'
-      - uses: actions/cache@v3
-        id: cache-pip
-        with:
-          path: ~/appdata/local/pip/cache
-          key: pip-windows
-      - name: Install hg
-        run:
-          pip install mercurial
-      - name: Run all tests
-        run: |
-          make SHELL='C:/Program Files/Git/usr/bin/bash' -C test
diff --git a/git-remote-hg b/git-remote-hg
index 6941dfd..b480fbf 100755
--- a/git-remote-hg
+++ b/git-remote-hg
@@ -147,10 +147,10 @@ else:
 # Commits are modified to preserve hg information and allow bidirectionality.
 #
 
-NAME_RE = re.compile(b'^([^<>]+)')
-AUTHOR_RE = re.compile(b'^([^<>]+?)? ?[<>]([^<>]*)(?:$|>)')
+NAME_RE = re.compile(br'^([^<>]+)')
+AUTHOR_RE = re.compile(br'^([^<>]+?)? ?[<>]([^<>]*)(?:$|>)')
 EMAIL_RE = re.compile(br'([^ \t<>]+@[^ \t<>]+)')
-AUTHOR_HG_RE = re.compile(b'^(.*?) ?<(.*?)(?:>(.*))?$')
+AUTHOR_HG_RE = re.compile(br'^(.*?) ?<(.*?)(?:>(.*))?$')
 RAW_AUTHOR_RE = re.compile(br'^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
 
 VERSION = 2
@@ -466,7 +466,7 @@ def fixup_user_git(user):
 def fixup_user_hg(user):
     def sanitize(name):
         # stole this from hg-git
-        return re.sub(b'[<>\n]', b'?', name.lstrip(b'< ').rstrip(b'> '))
+        return re.sub(br'[<>\n]', b'?', name.lstrip(b'< ').rstrip(b'> '))
 
     m = AUTHOR_HG_RE.match(user)
     if m:
@@ -1319,7 +1319,10 @@ def checkheads(repo, remote, p_revs, force):
 def push_unsafe(repo, remote, p_revs, force):
 
     fci = discovery.findcommonincoming
-    commoninc = fci(repo, remote, force=force)
+    if check_version(4, 5):
+        commoninc = fci(repo, remote, force=force, ancestorsof=list(p_revs))
+    else:
+        commoninc = fci(repo, remote, force=force)
     common, _, remoteheads = commoninc
     fco = discovery.findcommonoutgoing
     outgoing = fco(repo, remote, onlyheads=list(p_revs), commoninc=commoninc, force=force)
@@ -1350,12 +1353,6 @@ def push_unsafe(repo, remote, p_revs, force):
     else:
         ret = remote.addchangegroup(cg, b'push', repo.url())
 
-    phases = remote.listkeys(b'phases')
-    if phases:
-        for head in p_revs:
-            # update to public
-            remote.pushkey(b'phases', hghex(head), b'1', b'0')
-
     return ret
 
 def push(repo, remote, p_revs, force):
diff --git a/tools/check-versions b/tools/check-versions
index daaee3d..aadd626 100755
--- a/tools/check-versions
+++ b/tools/check-versions
@@ -107,7 +107,7 @@ def setup
   FileUtils.mkdir_p(dirs.map { |e| "#{$builddir}/#{e}" })
   FileUtils.mkdir_p($workdir)
 
-  return if File.exists?($hg.dir)
+  return if File.exist?($hg.dir)
 
   if $verbosity < HIGH
     puts "Cloning hg"