How to turn MacBook Pro wifi off when closed?

[Sacha Baptista]

Hello,

My wife has a MacBook Pro (10.11) and we've noticed that it remains connected to our wifi when closed and supposed to be in sleep mode.

I have already checked the energy prefs, which are as follows :

Battery :

1) Put HD to sleep when possible : yes

2) Slightly dim light : yes)

3) Enable power nap : no

Power adapter :

1) Prevent computer from sleeping automatically when display off : no

2) Put HD to sleep : yes

3) Wake for wifi access : no

4) Enable power nap : no

I really dislike the fact that it stays connected overnight as it uselessly consumes the battery.

What could I do to prevent that behaviour?

Thanks in advance!