no AHT available

Nothing happening on my late 13" 2011 MBP when pressing D on startup. The grey Apple screen is just delayed ( no difference between keeping D down as long as the grey screen is not up or keepng it pressed for only a couple of seconds ) and then the Mac just boots up.

No internet call was made by the system, although an ethernet connection exists

Previous OS updates have all been done with CCC and it's tool to copy and keep the hidden restore partition.

But I never called upon the AHT when original Lion was on the drive, so I can't say if it ever was implemented.

Still waiting for Yosemite to kill the WiFi problem that I clearly have on the other machines I administer, 'yil then, my private Mac remains in the hands of proven Mavericks.

Are there any other possibilities to launch a thorough hardware test, with or without Apple's tools ?