'
. ./test-lib.sh
-. ../diff-lib.sh ;# test-lib chdir's into trash
+. "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
test_expect_success \
'prepare reference tree' \
'mkdir path0 path1 &&
- cp ../../COPYING path0/COPYING &&
+ cp "$TEST_DIRECTORY"/../COPYING path0/COPYING &&
git update-index --add path0/COPYING &&
tree=$(git write-tree) &&
echo $tree'