test-lib: provide case insensitivity as a prerequisite

diff --git a/t/t9130-git-svn-authors-file.sh b/t/t9130-git-svn-authors-file.sh
index ec0a10661409d24c77bf2061bd8a554bfb565d74..c3443ceb251f87806312f4e6dadb54881b52a8fe 100755 (executable)
--- a/t/t9130-git-svn-authors-file.sh
+++ b/t/t9130-git-svn-authors-file.sh
@@ -96,9 +96,8 @@ test_expect_success 'fresh clone with svn.authors-file in config' '
                rm -r "$GIT_DIR" &&
                test x = x"$(git config svn.authorsfile)" &&
                test_config="$HOME"/.gitconfig &&
-               unset GIT_CONFIG_NOGLOBAL &&
-               unset GIT_DIR &&
-               unset GIT_CONFIG &&
+               sane_unset GIT_DIR &&
+               sane_unset GIT_CONFIG &&
                git config --global \
                  svn.authorsfile "$HOME"/svn-authors &&
                test x"$HOME"/svn-authors = x"$(git config svn.authorsfile)" &&