patch 8.2.2525: Vim9: only local variables checked for a name Commit: https://github.com/vim/vim/commit/e0890d678d4d31ca1810c90f3afe2ba89dfedcfa Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 17 14:52:14 2021 +0100 patch 8.2.2525: Vim9: only local variables checked for a name Problem: Vim9: only local variables checked for a name. Solution: Also check arguments and script variables. (closes https://github.com/vim/vim/issues/7838)

" 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