Senate Majority Leader John Flanagan says he’s not convinced lawmakers should extend mayoral control of New York City schools for Mayor Bill de Blasio.

In a statement released Thursday afternoon, Flanagan said he had reviewed Wednesday’s Senate hearing on the issue and wasn’t impressed with the mayor’s testimony.

“Too often, the Mayor showed a disturbing lack of personal knowledge about the City schools,” Flanagan said in a statement. “In addition, he has left too many unanswered questions and failed to provide specifics on many of the issues raised by my colleagues on both sides of the aisle.  Until that occurs, I will not entrust this Mayor with the awesome responsibility of operating the New York City school system.”

Lawmakers voted in 2015 to extend mayoral control for one year, with an expiration date at the end of June. Senate Deputy Majority Leader John DeFrancisco suggested on Capital Tonight last night that Republicans would approve an extension, though the length of which is unclear.

De Blasio had previously requested a permanent extension to mayoral control, then offered a three-year extension to lawmakers as a compromise. Neither idea made it to the floor.

The mayor is sitting in hot water with Senate Republicans for the time being after an elections probe into his 2014 effort to help Democrats win back the chamber. De Blasio had a tense exchange with at least one Senate Republican during yesterday’s hearing.

The Senate will hold another public hearing on mayoral control on May 19 in New York City. In his statement, Flanagan encouraged the mayor to return for a second round.