t4151: make sure argument to 'test -z' is given

diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh
index fa207f3b8cae5397904f5fb8da2b20b67d297415..d1ff5c94f2f3241b3b1ed436d0011280986abab7 100755 (executable)
--- a/t/t7004-tag.sh
+++ b/t/t7004-tag.sh
@@ -1491,10 +1491,10 @@ run_with_limited_stack () {
        (ulimit -s 128 && "$@")
 }
 
-test_lazy_prereq ULIMIT 'run_with_limited_stack true'
+test_lazy_prereq ULIMIT_STACK_SIZE 'run_with_limited_stack true'
 
 # we require ulimit, this excludes Windows
-test_expect_success ULIMIT '--contains works in a deep repo' '
+test_expect_success ULIMIT_STACK_SIZE '--contains works in a deep repo' '
        >expect &&
        i=1 &&
        while test $i -lt 8000