diff --git a/modules/pacing/paced_sender.cc b/modules/pacing/paced_sender.cc
index 57dbc4f248..51d3edc301 100644
--- a/modules/pacing/paced_sender.cc
+++ b/modules/pacing/paced_sender.cc
@@ -124,6 +124,7 @@ void PacedSender::EnqueuePackets(
                    packet->SequenceNumber(), "rtp_timestamp",
                    packet->Timestamp());
 
+      RTC_DCHECK_GE(packet->capture_time_ms(), 0);
       pacing_controller_.EnqueuePacket(std::move(packet));
     }
   }
diff --git a/modules/pacing/pacing_controller.cc b/modules/pacing/pacing_controller.cc
index 3ac7afa7ea..e0ace4e65e 100644
--- a/modules/pacing/pacing_controller.cc
+++ b/modules/pacing/pacing_controller.cc
@@ -295,11 +295,7 @@ void PacingController::EnqueuePacketInternal(
     int priority) {
   prober_.OnIncomingPacket(DataSize::Bytes(packet->payload_size()));
 
-  // TODO(sprang): Make sure tests respect this, replace with DCHECK.
   Timestamp now = CurrentTime();
-  if (packet->capture_time_ms() < 0) {
-    packet->set_capture_time_ms(now.ms());
-  }
 
   if (mode_ == ProcessMode::kDynamic && packet_queue_.Empty() &&
       NextSendTime() <= now) {
diff --git a/modules/pacing/task_queue_paced_sender.cc b/modules/pacing/task_queue_paced_sender.cc
index 69ec5457ad..8ba49770d4 100644
--- a/modules/pacing/task_queue_paced_sender.cc
+++ b/modules/pacing/task_queue_paced_sender.cc
@@ -136,6 +136,7 @@ void TaskQueuePacedSender::EnqueuePackets(
   task_queue_.PostTask([this, packets_ = std::move(packets)]() mutable {
     RTC_DCHECK_RUN_ON(&task_queue_);
     for (auto& packet : packets_) {
+      RTC_DCHECK_GE(packet->capture_time_ms(), 0);
       pacing_controller_.EnqueuePacket(std::move(packet));
     }
     MaybeProcessPackets(Timestamp::MinusInfinity());