Connecting batteries in parallel doesn't produce greater amperage
As the comment mentions, paralleling and short circuiting lithium batteries is potentially very dangerous if you don't know exactly what you are doing. Most Li-Ion batteries have a protection circuit which includes overvoltage and overcurrent protection, but it's still not a good idea at all. Much better would be to test this using a couple of small alkaline batteries (e.g. AAA) and still do it briefly. 

If you absolutely must test the current on the Li-ions, then read the datasheet, see what the maximum current rating is and for how long, then use external current limiting on each battery.