Has anyone got airbase-ng to capture the 4-way WPA/WPA2 handshake?

I tried as per the documentation to run "airbase-ng -c 5 -e wifitest -Z 4 ath0", client associates to my AP, but only produces to EAPoL packets instead of 4. i tried with WPA (airbase-ng -c 5 -e wifitest -z 2 ath0) and WPA2 with no luck.

Searching for this, I see the same command I entered in many different examples on capturing WPA/WPA2 handshake.