The Dallas Opera has announced the cancelation of two performances of its upcoming “Song Series.”

The concerts, which were scheduled for March 31 and April 3, were nullified due to a positive COVID-19 test by a contractor associated with the presentations.

The March 31 concert was to be headlined by bass Morris Robinson with the April 3 showcase set to feature soprano Leah Crocetto and mezzo-soprano Jamie Barton.

“All of us at The Dallas Opera are deeply disappointed to announce these cancellations,” said Ian Derrer, The Kern Wildenthal General Director and CEO, in a press release. “We have rigorous protocols in place for the health of everyone associated with our presentations, and while this situation proves that those protocols are working, we are terribly saddened nonetheless to have to make this announcement. We plan to resume our live events as scheduled on April 9, and look forward to announcing new dates for these cancelled concerts.”

The series’ April 9 performance will feature countertenor John Holiday.