t4000: make hash size independent

diff --git a/t/t3405-rebase-malformed.sh b/t/t3405-rebase-malformed.sh
index da94dddc86d78830664d3a4b910ab157c2db2f0f..860e63e444d296c64773bae0d743fbb80fe674f1 100755 (executable)
--- a/t/t3405-rebase-malformed.sh
+++ b/t/t3405-rebase-malformed.sh
@@ -83,7 +83,7 @@ test_expect_success 'rebase -m commit with empty message' '
 test_expect_success 'rebase -i commit with empty message' '
        git checkout diff-in-message &&
        set_fake_editor &&
-       env FAKE_COMMIT_MESSAGE=" " FAKE_LINES="reword 1" \
+       test_must_fail env FAKE_COMMIT_MESSAGE=" " FAKE_LINES="reword 1" \
                git rebase -i HEAD^
 '