Rep. Darrell Issa, R-Calif., said Sunday that former Internal Revenue Service official Lois Lerner was not offered immunity in exchange for her upcoming testimony about the targeting of Tea Party groups.

When “ Fox News Sunday” host Chris Wallace asked Issa, chairman of the House Oversight and Government Reform Committee, why Lerner had decided to testify and whether she had been offered immunity, the California Republican responded decisively.

“We did not,” Issa said.

In May 2013, Lerner invoked her Fifth Amendment right to avoid testifying before the panel. Last week, Lerner's attorneys said she would only return to Capitol Hill to testify if she was offered immunity.

Issa said he didn't know what changed Lerner's mind about testifying.

Lerner “retired” from the IRS last year amid the scandal.

Update: Lerner's attorney now says Issa was wrong -- she will not testify and will continue to invoke her Fifth Amendment rights.