The New York Stock Exchange is taking no chances that anything will go wrong when Snapchat parent Snap issues its IPO, expected in March, so they are having a trial run this Saturday.

Stock traders were given notice last week that the practice IPO will be taking place, Reuters reports. Snap's IPO is expected to be the largest tech IPO in about five years.

With the expected size of the IPO the NYSE has a lot on the line, in terms of its reputation and the smallest issue could be damaging, sources told Reuters. No doubt the NYSE is thinking of the criticism Nasdaq received in 2012 for being technologically unprepared for the level of demand for Facebook  (FB - Get Report) when it went public.