To test your test leads you will do 1 at a time. You will put your meter in the ohms position and take 1 of your test leads and plug it into the 
then take the tip of that test lead and touch it to the inside metal of the COM jack. We should get a low ohms reading 0.0 to 0.5 or so, then move the test lead a little keeping the tip of the probe in the COM jack and we might get a few number jumping a little but going back to the low number at would be good. If we move the lead around and we are getting a change to a much higher number and kind of sticks around there your test lead would be bad. Do with both test leads as one might be good and the other bad.
Intermittent readings, Ohms readings not stable Test your test leads
I'd also say, watch out for the older style Fluke TL71 and TL224 type lead sets as they fail prematurely but slowly. They'll usually go open or high ohms if you pull just a little bit on either end of the lead, probe end or connector end, while holding them shorted of course, as described above.