test: fix t7001 cp to use POSIX options

diff --git a/t/t0070-fundamental.sh b/t/t0070-fundamental.sh
index 986b2a8f2664b1734964049a5b24fc50cf938cfe..5ed69a6f566bf3a7944b41bace4cfbe26d015040 100755 (executable)
--- a/t/t0070-fundamental.sh
+++ b/t/t0070-fundamental.sh
@@ -25,6 +25,10 @@ test_expect_success POSIXPERM,SANITY 'mktemp to unwritable directory prints file
        grep "cannotwrite/test" err
 '
 
+test_expect_success 'git_mkstemps_mode does not fail if fd 0 is not open' '
+       git commit --allow-empty -m message <&-
+'
+
 test_expect_success 'check for a bug in the regex routines' '
        # if this test fails, re-build git with NO_REGEX=1
        test-regex