test_expect_success \
'prepare reference tree' \
'mkdir path0 path1 &&
- cp ../../COPYING path0/COPYING &&
+ cp "$TEST_DIRECTORY"/../COPYING path0/COPYING &&
git add path0/COPYING &&
git commit -m add -a'
test_expect_success \
'adding another file' \
- 'cp ../../README path0/README &&
+ 'cp "$TEST_DIRECTORY"/../README path0/README &&
git add path0/README &&
git commit -m add2 -a'