struct commit_list *parent = xmalloc(sizeof(*parent));
 
        write_tree_trivial(result_tree);
-       printf("Wonderful.\n");
+       printf(_("Wonderful.\n"));
        parent->item = lookup_commit(head);
        parent->next = xmalloc(sizeof(*parent->next));
        parent->next->item = remoteheads->item;
 
 
 test_debug 'git log --graph --decorate --oneline --all'
 
-test_expect_success 'in-index merge' '
+test_expect_success C_LOCALE_OUTPUT 'in-index merge' '
        git reset --hard c0 &&
        git merge --no-ff -s resolve c1 >out &&
        grep "Wonderful." out &&