diff --git a/tests/test-commit-interactive-curses.t b/tests/test-commit-interactive-curses.t
--- a/tests/test-commit-interactive-curses.t
+++ b/tests/test-commit-interactive-curses.t
@@ -345,7 +345,7 @@
   > $PYTHON <<EOF
   > from mercurial import hg, ui;\
   > repo = hg.repository(ui.ui.load(), ".");\
-  > print repo.ui.interface("chunkselector")
+  > print(repo.ui.interface("chunkselector"))
   > EOF
   > }
   $ chunkselectorinterface
diff --git a/tests/test-commit-multiple.t b/tests/test-commit-multiple.t
--- a/tests/test-commit-multiple.t
+++ b/tests/test-commit-multiple.t
@@ -90,7 +90,7 @@
   >     f.close()
   > 
   > def printfiles(repo, rev):
-  >     print "revision %s files: %s" % (rev, repo[rev].files())
+  >     print("revision %s files: %s" % (rev, repo[rev].files()))
   > 
   > repo = hg.repository(ui.ui.load(), '.')
   > assert len(repo) == 6, \
@@ -99,14 +99,14 @@
   > replacebyte("bugfix", "u")
   > sleep(2)
   > try:
-  >     print "PRE: len(repo): %d" % len(repo)
+  >     print("PRE: len(repo): %d" % len(repo))
   >     wlock = repo.wlock()
   >     lock = repo.lock()
   >     replacebyte("file1", "x")
   >     repo.commit(text="x", user="test", date=(0, 0))
   >     replacebyte("file1", "y")
   >     repo.commit(text="y", user="test", date=(0, 0))
-  >     print "POST: len(repo): %d" % len(repo)
+  >     print("POST: len(repo): %d" % len(repo))
   > finally:
   >     lock.release()
   >     wlock.release()
diff --git a/tests/test-contrib-check-code.t b/tests/test-contrib-check-code.t
--- a/tests/test-contrib-check-code.t
+++ b/tests/test-contrib-check-code.t
@@ -213,32 +213,32 @@
   [1]
 
   $ cat > ./map-inside-gettext.py <<EOF
-  > print _("map inside gettext %s" % v)
+  > print(_("map inside gettext %s" % v))
   > 
-  > print _("concatenating " " by " " space %s" % v)
-  > print _("concatenating " + " by " + " '+' %s" % v)
+  > print(_("concatenating " " by " " space %s" % v))
+  > print(_("concatenating " + " by " + " '+' %s" % v))
   > 
-  > print _("mapping operation in different line %s"
-  >         % v)
+  > print(_("mapping operation in different line %s"
+  >         % v))
   > 
-  > print _(
-  >         "leading spaces inside of '(' %s" % v)
+  > print(_(
+  >         "leading spaces inside of '(' %s" % v))
   > EOF
   $ "$check_code" ./map-inside-gettext.py
   ./map-inside-gettext.py:1:
-   > print _("map inside gettext %s" % v)
+   > print(_("map inside gettext %s" % v))
    don't use % inside _()
   ./map-inside-gettext.py:3:
-   > print _("concatenating " " by " " space %s" % v)
+   > print(_("concatenating " " by " " space %s" % v))
    don't use % inside _()
   ./map-inside-gettext.py:4:
-   > print _("concatenating " + " by " + " '+' %s" % v)
+   > print(_("concatenating " + " by " + " '+' %s" % v))
    don't use % inside _()
   ./map-inside-gettext.py:6:
-   > print _("mapping operation in different line %s"
+   > print(_("mapping operation in different line %s"
    don't use % inside _()
   ./map-inside-gettext.py:9:
-   > print _(
+   > print(_(
    don't use % inside _()
   [1]
 
diff --git a/tests/test-convert-cvs.t b/tests/test-convert-cvs.t
--- a/tests/test-convert-cvs.t
+++ b/tests/test-convert-cvs.t
@@ -12,10 +12,10 @@
   $ echo "convert = " >> $HGRCPATH
   $ cat > cvshooks.py <<EOF
   > def cvslog(ui,repo,hooktype,log):
-  >     print "%s hook: %d entries"%(hooktype,len(log))
+  >     print("%s hook: %d entries"%(hooktype,len(log)))
   > 
   > def cvschangesets(ui,repo,hooktype,changesets):
-  >     print "%s hook: %d changesets"%(hooktype,len(changesets))
+  >     print("%s hook: %d changesets"%(hooktype,len(changesets)))
   > EOF
   $ hookpath=`pwd`
   $ cat <<EOF >> $HGRCPATH
diff --git a/tests/test-eol.t b/tests/test-eol.t
--- a/tests/test-eol.t
+++ b/tests/test-eol.t
@@ -16,7 +16,7 @@
   > except ImportError:
   >     pass
   > (old, new) = sys.argv[1] == 'LF' and ('\n', '\r\n') or ('\r\n', '\n')
-  > print "%% switching encoding from %r to %r" % (old, new)
+  > print("%% switching encoding from %r to %r" % (old, new))
   > for path in sys.argv[2:]:
   >     data = file(path, 'rb').read()
   >     data = data.replace(old, new)
diff --git a/tests/test-extension.t b/tests/test-extension.t
--- a/tests/test-extension.t
+++ b/tests/test-extension.t
@@ -75,13 +75,13 @@
   $ cat > foo.py <<EOF
   > import os
   > name = os.path.basename(__file__).rsplit('.', 1)[0]
-  > print "1) %s imported" % name
+  > print("1) %s imported" % name)
   > def uisetup(ui):
-  >     print "2) %s uisetup" % name
+  >     print("2) %s uisetup" % name)
   > def extsetup():
-  >     print "3) %s extsetup" % name
+  >     print("3) %s extsetup" % name)
   > def reposetup(ui, repo):
-  >    print "4) %s reposetup" % name
+  >    print("4) %s reposetup" % name)
   > 
   > # custom predicate to check registration of functions at loading
   > from mercurial import (
@@ -172,7 +172,7 @@
   $ cat > loadabs.py <<EOF
   > import mod.ambigabs as ambigabs
   > def extsetup():
-  >     print 'ambigabs.s=%s' % ambigabs.s
+  >     print('ambigabs.s=%s' % ambigabs.s)
   > EOF
   $ (PYTHONPATH=${PYTHONPATH}${PATHSEP}${TESTTMP}/libroot; hg --config extensions.loadabs=loadabs.py root)
   ambigabs.s=libroot/ambig.py
@@ -186,7 +186,7 @@
   $ cat > loadrel.py <<EOF
   > import mod.ambigrel as ambigrel
   > def extsetup():
-  >     print 'ambigrel.s=%s' % ambigrel.s
+  >     print('ambigrel.s=%s' % ambigrel.s)
   > EOF
   $ (PYTHONPATH=${PYTHONPATH}${PATHSEP}${TESTTMP}/libroot; hg --config extensions.loadrel=loadrel.py root)
   ambigrel.s=libroot/mod/ambig.py
diff --git a/tests/test-filebranch.t b/tests/test-filebranch.t
--- a/tests/test-filebranch.t
+++ b/tests/test-filebranch.t
@@ -2,8 +2,9 @@
 when we do a merge.
 
   $ cat <<EOF > merge
+  > from __future__ import print_function
   > import sys, os
-  > print "merging for", os.path.basename(sys.argv[1])
+  > print("merging for", os.path.basename(sys.argv[1]))
   > EOF
   $ HGMERGE="$PYTHON ../merge"; export HGMERGE
 
diff --git a/tests/test-glog.t b/tests/test-glog.t
--- a/tests/test-glog.t
+++ b/tests/test-glog.t
@@ -1633,7 +1633,7 @@
 Test glob expansion of pats
 
   $ expandglobs=`$PYTHON -c "import mercurial.util; \
-  >   print mercurial.util.expandglobs and 'true' or 'false'"`
+  >   print(mercurial.util.expandglobs and 'true' or 'false')"`
   $ if [ $expandglobs = "true" ]; then
   >    testlog 'a*';
   > else
diff --git a/tests/test-hardlinks.t b/tests/test-hardlinks.t
--- a/tests/test-hardlinks.t
+++ b/tests/test-hardlinks.t
@@ -1,11 +1,12 @@
 #require hardlink
 
   $ cat > nlinks.py <<EOF
+  > from __future__ import print_function
   > import sys
   > from mercurial import util
   > for f in sorted(sys.stdin.readlines()):
   >     f = f[:-1]
-  >     print util.nlinks(f), f
+  >     print(util.nlinks(f), f)
   > EOF
 
   $ nlinksdir()
diff --git a/tests/test-help.t b/tests/test-help.t
--- a/tests/test-help.t
+++ b/tests/test-help.t
@@ -1709,7 +1709,7 @@
 
   $ $PYTHON <<EOF | sh
   > upper = "\x8bL\x98^"
-  > print "hg --encoding cp932 help -e ambiguous.%s" % upper
+  > print("hg --encoding cp932 help -e ambiguous.%s" % upper)
   > EOF
   \x8bL\x98^ (esc)
   ----
@@ -1719,7 +1719,7 @@
 
   $ $PYTHON <<EOF | sh
   > lower = "\x8bl\x98^"
-  > print "hg --encoding cp932 help -e ambiguous.%s" % lower
+  > print("hg --encoding cp932 help -e ambiguous.%s" % lower)
   > EOF
   \x8bl\x98^ (esc)
   ----
diff --git a/tests/test-hook.t b/tests/test-hook.t
--- a/tests/test-hook.t
+++ b/tests/test-hook.t
@@ -409,6 +409,7 @@
   $ cd "$TESTTMP/b"
 
   $ cat > hooktests.py <<EOF
+  > from __future__ import print_function
   > from mercurial import error
   > 
   > uncallable = 0
@@ -418,9 +419,9 @@
   >     args.pop('repo', None)
   >     a = list(args.items())
   >     a.sort()
-  >     print 'hook args:'
+  >     print('hook args:')
   >     for k, v in a:
-  >        print ' ', k, v
+  >        print(' ', k, v)
   > 
   > def passhook(**args):
   >     printargs(args)
@@ -445,7 +446,7 @@
   >     ui.note('verbose output from hook\n')
   > 
   > def printtags(ui, repo, **args):
-  >     print sorted(repo.tags())
+  >     print(sorted(repo.tags()))
   > 
   > class container:
   >     unreachable = 1
@@ -630,7 +631,7 @@
 
   $ cat > hookext.py <<EOF
   > def autohook(**args):
-  >     print "Automatically installed hook"
+  >     print("Automatically installed hook")
   > 
   > def reposetup(ui, repo):
   >     repo.ui.setconfig("hooks", "commit.auto", autohook)
@@ -667,7 +668,7 @@
   $ cd hooks
   $ cat > testhooks.py <<EOF
   > def testhook(**args):
-  >     print 'hook works'
+  >     print('hook works')
   > EOF
   $ echo '[hooks]' > ../repo/.hg/hgrc
   $ echo "pre-commit.test = python:`pwd`/testhooks.py:testhook" >> ../repo/.hg/hgrc
diff --git a/tests/test-inherit-mode.t b/tests/test-inherit-mode.t
--- a/tests/test-inherit-mode.t
+++ b/tests/test-inherit-mode.t
@@ -25,13 +25,13 @@
   > allnames.sort()
   > for name in allnames:
   >     suffix = name in isdir and '/' or ''
-  >     print '%05o %s%s' % (os.lstat(name).st_mode & 07777, name, suffix)
+  >     print('%05o %s%s' % (os.lstat(name).st_mode & 07777, name, suffix))
   > EOF
 
   $ cat >mode.py <<EOF
   > import sys
   > import os
-  > print '%05o' % os.lstat(sys.argv[1]).st_mode
+  > print('%05o' % os.lstat(sys.argv[1]).st_mode)
   > EOF
 
   $ umask 077
diff --git a/tests/test-issue4074.t b/tests/test-issue4074.t
--- a/tests/test-issue4074.t
+++ b/tests/test-issue4074.t
@@ -8,7 +8,7 @@
   >     print
   >     if random.randint(0, 100) >= 50:
   >         x += 1
-  >     print hex(x)
+  >     print(hex(x))
   > EOF
 
   $ hg init a
diff --git a/tests/test-largefiles-cache.t b/tests/test-largefiles-cache.t
--- a/tests/test-largefiles-cache.t
+++ b/tests/test-largefiles-cache.t
@@ -96,7 +96,7 @@
   > #!$PYTHON
   > import sys, os
   > path = sys.argv[1]
-  > print '%03o' % (os.lstat(path).st_mode & 0777)
+  > print('%03o' % (os.lstat(path).st_mode & 0777))
   > EOF
   $ chmod +x ls-l.py
 
diff --git a/tests/test-log.t b/tests/test-log.t
--- a/tests/test-log.t
+++ b/tests/test-log.t
@@ -1793,7 +1793,7 @@
   $ cd problematicencoding
 
   $ $PYTHON > setup.sh <<EOF
-  > print u'''
+  > print(u'''
   > echo a > text
   > hg add text
   > hg --encoding utf-8 commit -u '\u30A2' -m none
@@ -1803,13 +1803,13 @@
   > hg --encoding utf-8 commit -u none -m '\u30A2'
   > echo d > text
   > hg --encoding utf-8 commit -u none -m '\u30C2'
-  > '''.encode('utf-8')
+  > '''.encode('utf-8'))
   > EOF
   $ sh < setup.sh
 
 test in problematic encoding
   $ $PYTHON > test.sh <<EOF
-  > print u'''
+  > print(u'''
   > hg --encoding cp932 log --template '{rev}\\n' -u '\u30A2'
   > echo ====
   > hg --encoding cp932 log --template '{rev}\\n' -u '\u30C2'
@@ -1817,7 +1817,7 @@
   > hg --encoding cp932 log --template '{rev}\\n' -k '\u30A2'
   > echo ====
   > hg --encoding cp932 log --template '{rev}\\n' -k '\u30C2'
-  > '''.encode('cp932')
+  > '''.encode('cp932'))
   > EOF
   $ sh < test.sh
   0
diff --git a/tests/test-merge-symlinks.t b/tests/test-merge-symlinks.t
--- a/tests/test-merge-symlinks.t
+++ b/tests/test-merge-symlinks.t
@@ -1,5 +1,6 @@
   $ cat > echo.py <<EOF
   > #!$PYTHON
+  > from __future__ import print_function
   > import os, sys
   > try:
   >     import msvcrt
@@ -9,7 +10,7 @@
   >     pass
   > 
   > for k in ('HG_FILE', 'HG_MY_ISLINK', 'HG_OTHER_ISLINK', 'HG_BASE_ISLINK'):
-  >     print k, os.environ[k]
+  >     print(k, os.environ[k])
   > EOF
 
 Create 2 heads containing the same file, once as
diff --git a/tests/test-merge1.t b/tests/test-merge1.t
--- a/tests/test-merge1.t
+++ b/tests/test-merge1.t
@@ -1,4 +1,5 @@
   $ cat <<EOF > merge
+  > from __future__ import print_function
   > import sys, os
   > 
   > try:
@@ -8,7 +9,7 @@
   > except ImportError:
   >     pass
   > 
-  > print "merging for", os.path.basename(sys.argv[1])
+  > print("merging for", os.path.basename(sys.argv[1]))
   > EOF
   $ HGMERGE="$PYTHON ../merge"; export HGMERGE
 
diff --git a/tests/test-merge6.t b/tests/test-merge6.t
--- a/tests/test-merge6.t
+++ b/tests/test-merge6.t
@@ -1,6 +1,6 @@
   $ cat <<EOF > merge
   > import sys, os
-  > print "merging for", os.path.basename(sys.argv[1])
+  > print("merging for", os.path.basename(sys.argv[1]))
   > EOF
   $ HGMERGE="$PYTHON ../merge"; export HGMERGE
 
diff --git a/tests/test-mq-eol.t b/tests/test-mq-eol.t
--- a/tests/test-mq-eol.t
+++ b/tests/test-mq-eol.t
@@ -33,7 +33,7 @@
   > for line in file(sys.argv[1], 'rb'):
   >     line = line.replace('\r', '<CR>')
   >     line = line.replace('\n', '<LF>')
-  >     print line
+  >     print(line)
   > EOF
 
   $ hg init repo
diff --git a/tests/test-notify-changegroup.t b/tests/test-notify-changegroup.t
--- a/tests/test-notify-changegroup.t
+++ b/tests/test-notify-changegroup.t
@@ -39,7 +39,7 @@
 push
 
   $ hg --traceback --cwd b push ../a 2>&1 |
-  >     $PYTHON -c 'import sys,re; print re.sub("\n\t", " ", sys.stdin.read()),'
+  >     $PYTHON -c 'from __future__ import print_function ; import sys,re; print(re.sub("\n\t", " ", sys.stdin.read()), end="")'
   pushing to ../a
   searching for changes
   adding changesets
@@ -92,7 +92,7 @@
 unbundle with correct source
 
   $ hg --config notify.sources=unbundle --cwd a unbundle ../test.hg 2>&1 |
-  >     $PYTHON -c 'import sys,re; print re.sub("\n\t", " ", sys.stdin.read()),'
+  >     $PYTHON -c 'from __future__ import print_function ; import sys,re; print(re.sub("\n\t", " ", sys.stdin.read()), end="")'
   adding changesets
   adding manifests
   adding file changes
@@ -167,7 +167,7 @@
 push
 
   $ hg --traceback --cwd b --config notify.fromauthor=True push ../a 2>&1 |
-  >     $PYTHON -c 'import sys,re; print re.sub("\n\t", " ", sys.stdin.read()),'
+  >     $PYTHON -c 'from __future__ import print_function ; import sys,re; print(re.sub("\n\t", " ", sys.stdin.read()), end="")'
   pushing to ../a
   searching for changes
   adding changesets