multi rules debugging

Hello,

I'm trying to use multi rules on Hashcat.

As I uderstant I can use it by putting many -r option.

To debug my rules files I usually use a line like that:

./hashcat-cli64.bin -r 1.rule --stdout

But when I enter


./hashcat-cli64.bin -r 1.rule -r 2.rule --stdout

It seems that it don't take the second rules.
Am i missing something?