test_expect_success \
'clone of non-existent source should fail' \
- '! git-clone foo bar'
+ 'test_must_fail git-clone foo bar'
test_expect_success \
'failed clone should not leave a directory' \
# current path not to the target dir
test_expect_success \
'clone of non-existent (relative to $PWD) source should fail' \
- '! git-clone ../foo baz'
+ 'test_must_fail git-clone ../foo baz'
test_expect_success \
'clone should work now that source exists' \