diff --git a/api/test/pclf/media_quality_test_params.h b/api/test/pclf/media_quality_test_params.h
index 65ca1c5cb7..3377d31f68 100644
--- a/api/test/pclf/media_quality_test_params.h
+++ b/api/test/pclf/media_quality_test_params.h
@@ -143,6 +143,13 @@ struct Params {
   PeerConnectionInterface::RTCOfferAnswerOptions rtc_offer_answer_options;
   BitrateSettings bitrate_settings;
   std::vector<VideoCodecConfig> video_codecs;
+
+  // A list of RTP header extensions which will be enforced on all video streams
+  // added to this peer.
+  std::vector<std::string> extra_video_rtp_header_extensions;
+  // A list of RTP header extensions which will be enforced on all audio streams
+  // added to this peer.
+  std::vector<std::string> extra_audio_rtp_header_extensions;
 };
 
 // Contains parameters that maybe changed by test writer during the test call.
diff --git a/api/test/pclf/peer_configurer.cc b/api/test/pclf/peer_configurer.cc
index ead1b5db06..2203a4c4f0 100644
--- a/api/test/pclf/peer_configurer.cc
+++ b/api/test/pclf/peer_configurer.cc
@@ -119,10 +119,25 @@ PeerConfigurer* PeerConfigurer::SetVideoSubscription(
   configurable_params_->video_subscription = std::move(subscription);
   return this;
 }
+PeerConfigurer* PeerConfigurer::SetVideoCodecs(
+    std::vector<VideoCodecConfig> video_codecs) {
+  params_->video_codecs = std::move(video_codecs);
+  return this;
+}
+PeerConfigurer* PeerConfigurer::SetExtraVideoRtpHeaderExtensions(
+    std::vector<std::string> extensions) {
+  params_->extra_video_rtp_header_extensions = std::move(extensions);
+  return this;
+}
 PeerConfigurer* PeerConfigurer::SetAudioConfig(AudioConfig config) {
   params_->audio_config = std::move(config);
   return this;
 }
+PeerConfigurer* PeerConfigurer::SetExtraAudioRtpHeaderExtensions(
+    std::vector<std::string> extensions) {
+  params_->extra_audio_rtp_header_extensions = std::move(extensions);
+  return this;
+}
 PeerConfigurer* PeerConfigurer::SetUseUlpFEC(bool value) {
   params_->use_ulp_fec = value;
   return this;
@@ -180,11 +195,6 @@ PeerConfigurer* PeerConfigurer::SetBitrateSettings(
   params_->bitrate_settings = bitrate_settings;
   return this;
 }
-PeerConfigurer* PeerConfigurer::SetVideoCodecs(
-    std::vector<VideoCodecConfig> video_codecs) {
-  params_->video_codecs = std::move(video_codecs);
-  return this;
-}
 
 PeerConfigurer* PeerConfigurer::SetIceTransportFactory(
     std::unique_ptr<IceTransportFactory> factory) {
diff --git a/api/test/pclf/peer_configurer.h b/api/test/pclf/peer_configurer.h
index 7841a261b3..996dc5cd89 100644
--- a/api/test/pclf/peer_configurer.h
+++ b/api/test/pclf/peer_configurer.h
@@ -113,16 +113,24 @@ class PeerConfigurer {
   // include all streams with `VideoSubscription::kSameAsSendStream`
   // resolution. To this behavior use this method.
   PeerConfigurer* SetVideoSubscription(VideoSubscription subscription);
-  // Set the list of video codecs used by the peer during the test. These
+  // Sets the list of video codecs used by the peer during the test. These
   // codecs will be negotiated in SDP during offer/answer exchange. The order
   // of these codecs during negotiation will be the same as in `video_codecs`.
   // Codecs have to be available in codecs list provided by peer connection to
   // be negotiated. If some of specified codecs won't be found, the test will
   // crash.
   PeerConfigurer* SetVideoCodecs(std::vector<VideoCodecConfig> video_codecs);
-  // Set the audio stream for the call from this peer. If this method won't
+  // Sets a list of RTP header extensions which will be enforced on all video
+  // streams added to this peer.
+  PeerConfigurer* SetExtraVideoRtpHeaderExtensions(
+      std::vector<std::string> extensions);
+  // Sets the audio stream for the call from this peer. If this method won't
   // be invoked, this peer will send no audio.
   PeerConfigurer* SetAudioConfig(AudioConfig config);
+  // Sets a list of RTP header extensions which will be enforced on all audio
+  // streams added to this peer.
+  PeerConfigurer* SetExtraAudioRtpHeaderExtensions(
+      std::vector<std::string> extensions);
 
   // Set if ULP FEC should be used or not. False by default.
   PeerConfigurer* SetUseUlpFEC(bool value);