patch 8.1.1166: gettitle test can still fail when another Vim is running commit https://github.com/vim/vim/commit/9c35d05f45e545825a15da07cc2f1c893c3789ee Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 13 20:39:15 2019 +0200 patch 8.1.1166: gettitle test can still fail when another Vim is running Problem: Gettitle test can still fail when another Vim is running. Solution: Accept any server name number. (Dominique Pelle, closes https://github.com/vim/vim/issues/4252)

" Settings for test script execution
" Always use "sh", don't use the value of "$SHELL".
set shell=sh

" Only when the +eval feature is present. 
if 1
  " While some tests overwrite $HOME to prevent them from polluting user files,
  " we need to remember the original value so that we can tell external systems
  " where to ask about their own user settings.
  let g:tester_HOME = $HOME
endif

source setup.vim