git --git-dir="$(pwd)//repo.git" --work-tree="$(pwd)" add dummy_file
'
+test_expect_success 'relative $GIT_WORK_TREE and git subprocesses' '
+ GIT_DIR=repo.git GIT_WORK_TREE=repo.git/work \
+ test-subprocess --setup-work-tree rev-parse --show-toplevel >actual &&
+ echo "$TRASH_DIRECTORY/repo.git/work" >expected &&
+ test_cmp expected actual
+'
+
test_done