Simonds requested a recount after Yancey beat her in the 94th District by 10 votes.
Election officials last month said Simonds beat Yancey by an 11,608-11,607 vote margin. A three-judge panel that was expected to certify the results on Dec. 19 determined one of the ballots contained a vote for Yancey.
The Daily Press newspaper reported it remains unclear whether Simonds will request a recount.
The Republicans will have a 51-49 majority in the House of Delegates when the 2018 legislative session begins on Jan. 10.
A federal judge in Alexandria on Friday will hear oral arguments in a lawsuit that challenges the results of the election between Republican Bob Thomas and Democrat Joshua Cole in the 28th District after 147 voters in Stafford County and Fredericksburg received the wrong ballots. The Virginia House Democratic Caucus is seeking a new election in the contested race.