patch 8.2.2681: Vim9: test fails for redeclaring script variable Commit: https://github.com/vim/vim/commit/12be734faffe1da04dfa9098e73abaa864204bc5 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 31 21:47:33 2021 +0200 patch 8.2.2681: Vim9: test fails for redeclaring script variable Problem: Vim9: test fails for redeclaring script variable. Solution: It's OK to assign to an existing script variable in legacy.

" 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