The New York Stock Exchange says its test run of Twitter’s initial public offering Saturday was a success, as the exchange takes pains to avoid the technical problems that marred Facebook’s debut.

While the NYSE frequently does testing on the weekend, this was the first time the exchange conducted a mock IPO.

Early Saturday, traders from member firms gathered with NYSE staff to run simulated buy and sell orders, test the flow of those orders and open the stock.

Twitter will be the biggest technology IPO since Facebook went public in May 2012.

Twitter, which is expected to go public sometime before Thanksgiving, has chosen to list on the New York Stock Exchange.

Twitter plans to sell 70 million shares between $17 and $20 each for a possible take of $1.6 billion.