diff -up vim80/runtime/tools/demoserver.py.python3-tests vim80/runtime/tools/demoserver.py

--- vim80/runtime/tools/demoserver.py.python3-tests	2018-05-11 08:24:41.774618804 +0200

+++ vim80/runtime/tools/demoserver.py	2018-05-11 09:24:48.363309856 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Server that will accept connections from a Vim channel.

 # Run this server and then in Vim you can open the channel:

diff -up vim80/src/auto/configure.python3-tests vim80/src/auto/configure

--- vim80/src/auto/configure.python3-tests	2018-05-11 08:25:03.632420873 +0200

+++ vim80/src/auto/configure	2018-05-11 09:25:26.062000471 +0200

@@ -6396,7 +6396,7 @@ eof

 	    if test "x$MACOS_X" = "xyes" && test -n "${python_PYTHONFRAMEWORK}" && ${vi_cv_path_python} -c \

 		"import sys; sys.exit(${vi_cv_var_python_version} < 2.3)"; then

 	      vi_cv_path_python_plibs="-framework Python"

-	      if test "x${vi_cv_path_python}" != "x/usr/bin/python" && test -n "${python_PYTHONFRAMEWORKPREFIX}"; then

+	      if test "x${vi_cv_path_python}" != "x/usr/bin/python2" && test -n "${python_PYTHONFRAMEWORKPREFIX}"; then

 		  vi_cv_path_python_plibs="-F${python_PYTHONFRAMEWORKPREFIX} -framework Python"

 	      fi

 	    else

diff -up vim80/src/configure.ac.python3-tests vim80/src/configure.ac

--- vim80/src/configure.ac.python3-tests	2018-05-11 08:25:26.070218957 +0200

+++ vim80/src/configure.ac	2018-05-11 09:26:01.603708243 +0200

@@ -1248,7 +1248,7 @@ eof

 	    if test "x$MACOS_X" = "xyes" && test -n "${python_PYTHONFRAMEWORK}" && ${vi_cv_path_python} -c \

 		"import sys; sys.exit(${vi_cv_var_python_version} < 2.3)"; then

 	      vi_cv_path_python_plibs="-framework Python"

-	      if test "x${vi_cv_path_python}" != "x/usr/bin/python" && test -n "${python_PYTHONFRAMEWORKPREFIX}"; then

+	      if test "x${vi_cv_path_python}" != "x/usr/bin/python2" && test -n "${python_PYTHONFRAMEWORKPREFIX}"; then

 		  vi_cv_path_python_plibs="-F${python_PYTHONFRAMEWORKPREFIX} -framework Python"

 	      fi

 	    else

diff -up vim80/src/testdir/test_channel_pipe.py.python3-tests vim80/src/testdir/test_channel_pipe.py

--- vim80/src/testdir/test_channel_pipe.py.python3-tests	2018-05-11 09:23:05.738146018 +0200

+++ vim80/src/testdir/test_channel_pipe.py	2018-05-11 09:26:37.354413350 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Server that will communicate over stdin/stderr

 #

diff -up vim80/src/testdir/test_channel.py.python3-tests vim80/src/testdir/test_channel.py

--- vim80/src/testdir/test_channel.py.python3-tests	2018-05-11 09:22:48.522284266 +0200

+++ vim80/src/testdir/test_channel.py	2018-05-11 09:26:17.762574955 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Server that will accept connections from a Vim channel.

 # Used by test_channel.vim.

diff -up vim80/src/testdir/test_channel_write.py.python3-tests vim80/src/testdir/test_channel_write.py

--- vim80/src/testdir/test_channel_write.py.python3-tests	2018-05-11 09:23:21.254021422 +0200

+++ vim80/src/testdir/test_channel_write.py	2018-05-11 09:26:54.952268193 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Program that writes a number to stdout repeatedly

 #

diff -up vim80/src/testdir/test_makeencoding.py.python3-tests vim80/src/testdir/test_makeencoding.py

--- vim80/src/testdir/test_makeencoding.py.python3-tests	2018-05-11 09:23:38.990878990 +0200

+++ vim80/src/testdir/test_makeencoding.py	2018-05-11 09:27:14.402107759 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 # -*- coding: utf-8 -*-

 # Test program for :make, :grep and :cgetfile.

diff -up vim80/src/testdir/test_netbeans.py.python3-tests vim80/src/testdir/test_netbeans.py

--- vim80/src/testdir/test_netbeans.py.python3-tests	2018-05-11 09:23:54.398752732 +0200

+++ vim80/src/testdir/test_netbeans.py	2018-05-11 09:27:30.489975057 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Server that will communicate with Vim through the netbeans interface.

 # Used by test_netbeans.vim.

diff -up vim80/src/testdir/test_short_sleep.py.python3-tests vim80/src/testdir/test_short_sleep.py

--- vim80/src/testdir/test_short_sleep.py.python3-tests	2018-05-11 09:24:09.134631798 +0200

+++ vim80/src/testdir/test_short_sleep.py	2018-05-11 09:27:48.432827053 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python3

 #

 # Program that sleeps for 100 msec

 #