submodules: always use a relative path to gitdir

diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 695f7afdf31cc589e9c31d764d1e713ad64240c0..2b70b2298b53d5caba1337d9e1ce9c7fe3d21e19 100755 (executable)
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -79,6 +79,8 @@ test_expect_success 'submodule add' '
                cd addtest &&
                git submodule add -q "$submodurl" submod >actual &&
                test ! -s actual &&
+               echo "gitdir: ../.git/modules/submod" >expect &&
+               test_cmp expect submod/.git &&
                git submodule init
        ) &&