--- /dev/null
+# -*- perl -*-
+use strict;
+use warnings;
+use tests::tests;
+check_expected (IGNORE_EXIT_CODES => 1, [<<'EOF']);
+(dir-mk-tree) begin
+(dir-mk-tree) creating /0/0/0/0 through /3/2/2/3...
+(dir-mk-tree) open "/0/2/0/3"
+(dir-mk-tree) close "/0/2/0/3"
+(dir-mk-tree) end
+EOF