test_expect_success 'setup separate repository lacking postimage' '
- git tar-tree initial initial | tar xf - &&
+ git tar-tree initial initial | $TAR xf - &&
(
cd initial && git init && git add .
) &&
- git tar-tree second second | tar xf - &&
+ git tar-tree second second | $TAR xf - &&
(
cd second && git init && git add .
)