diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc b/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
index 290f0cb125..905659d0ee 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/send_side.cc
@@ -75,6 +75,8 @@ void SendSideBweSender::GiveFeedback(const FeedbackPacket& feedback) {
   bwe_->OnRttUpdate(rtt_ms, rtt_ms);
   BWE_TEST_LOGGING_PLOT(1, "RTT", clock_->TimeInMilliseconds(), rtt_ms);
 
+  std::sort(packet_feedback_vector.begin(), packet_feedback_vector.end(),
+            PacketFeedbackComparator());
   acknowledged_bitrate_estimator_->IncomingPacketFeedbackVector(
       packet_feedback_vector);
   DelayBasedBwe::Result result = bwe_->IncomingPacketFeedbackVector(