tests: update for revised open API.
tests: update for revised open API.

luaposix/luaposix,rrthomas/luaposix,jimmyharris/luaposix,rrthomas/luaposix,ardje/luaposix,jimmyharris/luaposix,snegovick/luaposix,snegovick/luaposix,zevv/luaposix,ardje/luaposix,zevv/luaposix