commit https://github.com/vim/vim/commit/f1b512a0b62d0fa47ee9b2612556f375e1f22fc2 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 1 20:50:54 2016 +0200 patch 7.4.2302 Problem: Default interface versions for MS-Windows are outdated. Solution: Use Active Perl 5.24, Python 3.5.2. Could only make it work with Ruby 1.9.2.

" Settings for test script execution
" Always use "COMMAND.COM", don't use the value of "$SHELL".
set shell=c:\COMMAND.COM shellquote= shellxquote= shellcmdflag=/c shellredir=>
" This is used only when the +eval feature is available.
if executable("cmd.exe")
   set shell=cmd.exe
endif

source setup.vim