* caps=  */{[kind]: true}, /* absCaptureTimeOffered= */true,
        /* absCaptureTimeAnswered= */true);
    const receiver = callee.getReceivers()[0];
    let senderCaptureTimeOffset = await listenForSenderCaptureTimeOffset(
        t, receiver);
    assert_true(senderCaptureTimeOffset != undefined);
  }, '[' + kind + '] getSynchronizationSources() should contain ' +
      'senderCaptureTimeOffset if absolute capture time RTP header extension ' +
      'is negotiated');
}

// Passes if `senderCaptureTimeOf