Real dwarves have long since realised that the other races prove no challenge. The REAL test would lie in invading a dwarven fortress. This is why enterprising dwarven mothers "accidentally" have their children kidnapped by goblins - thanks to the everpresent goblins around them, the dwarven children have an unending supply of training dummies to hone their martial skill. As the dwarfling grows, so, too, does his command of his now-subdued goblin civilization. At the ripe age of twelve, the dwarf child leads his goblin thralls in attack of a dwarf fortress, using the semi-elven scum as movable cover while he closes in on the kill.
Dwarven Mothers who want to challenge their fort, leave their young in front of goblin settlements that specialize in whip based militia, as while the dwarves still cannot figure out how to make a whip, they know a better challenge is not a dwarf leading goblins, but a dwarf wielding a whip, leading whip armed goblins
Sadistic Dwarven Mothers leave their young at the Elven Settlements. It can either cause chaos, a war where the Elves beg the mother to take back their baby (Urist McHelen, the baby that launched a thousand unicorn riders), or, practice for the new dwarven militia recruits.
Training practice in this instance, is where the militia uses an accurate anatomy'd opponent with laughably weak armor, to train for piercing armor.
It also provides entertainment, as the elf raised dwarf is astonished by how his armor, a tree grown into the shape of his armor, and the tree being the holiest form of life, does not use its divine powers to prevent the weapons from stabbing him.
EDIT: Sorry, I just read that over. I realized I'm killing the joke.