diff --git a/api/test/mock_peerconnectioninterface.h b/api/test/mock_peerconnectioninterface.h
index 22a77d7dfe..814d1b1420 100644
--- a/api/test/mock_peerconnectioninterface.h
+++ b/api/test/mock_peerconnectioninterface.h
@@ -160,6 +160,10 @@ class MockPeerConnectionInterface : public webrtc::PeerConnectionInterface {
               (std::unique_ptr<SessionDescriptionInterface>,
                rtc::scoped_refptr<SetRemoteDescriptionObserverInterface>),
               (override));
+  MOCK_METHOD(bool,
+              ShouldFireNegotiationNeededEvent,
+              (uint32_t event_id),
+              (override));
   MOCK_METHOD(PeerConnectionInterface::RTCConfiguration,
               GetConfiguration,
               (),
@@ -195,6 +199,10 @@ class MockPeerConnectionInterface : public webrtc::PeerConnectionInterface {
               (override));
   MOCK_METHOD(PeerConnectionState, peer_connection_state, (), (override));
   MOCK_METHOD(IceGatheringState, ice_gathering_state, (), (override));
+  MOCK_METHOD(void,
+              AddAdaptationResource,
+              (rtc::scoped_refptr<Resource>),
+              (override));
   MOCK_METHOD(absl::optional<bool>, can_trickle_ice_candidates, (), (override));
   MOCK_METHOD(bool,
               StartRtcEventLog,
@@ -206,6 +214,7 @@ class MockPeerConnectionInterface : public webrtc::PeerConnectionInterface {
               (override));
   MOCK_METHOD(void, StopRtcEventLog, (), (override));
   MOCK_METHOD(void, Close, (), (override));
+  MOCK_METHOD(rtc::Thread*, signaling_thread, (), (const override));
 };
 
 static_assert(
diff --git a/pc/test/fake_peer_connection_base.h b/pc/test/fake_peer_connection_base.h
index 9e4ed6d175..8422f0b749 100644
--- a/pc/test/fake_peer_connection_base.h
+++ b/pc/test/fake_peer_connection_base.h
@@ -177,6 +177,8 @@ class FakePeerConnectionBase : public PeerConnectionInternal {
       rtc::scoped_refptr<SetRemoteDescriptionObserverInterface> observer)
       override {}
 
+  bool ShouldFireNegotiationNeededEvent(uint32_t event_id) { return true; }
+
   RTCConfiguration GetConfiguration() override { return RTCConfiguration(); }
 
   RTCError SetConfiguration(
@@ -229,6 +231,8 @@ class FakePeerConnectionBase : public PeerConnectionInternal {
 
   absl::optional<bool> can_trickle_ice_candidates() { return absl::nullopt; }
 
+  void AddAdaptationResource(rtc::scoped_refptr<Resource> resource) {}
+
   bool StartRtcEventLog(std::unique_ptr<RtcEventLogOutput> output,
                         int64_t output_period_ms) override {
     return false;
diff --git a/pc/test/mock_peer_connection_internal.h b/pc/test/mock_peer_connection_internal.h
index b5f47cc46a..e586008e1b 100644
--- a/pc/test/mock_peer_connection_internal.h
+++ b/pc/test/mock_peer_connection_internal.h
@@ -153,6 +153,10 @@ class MockPeerConnectionInternal : public PeerConnectionInternal {
               (std::unique_ptr<SessionDescriptionInterface>,
                rtc::scoped_refptr<SetRemoteDescriptionObserverInterface>),
               (override));
+  MOCK_METHOD(bool,
+              ShouldFireNegotiationNeededEvent,
+              (uint32_t event_id),
+              (override));
   MOCK_METHOD(PeerConnectionInterface::RTCConfiguration,
               GetConfiguration,
               (),
@@ -192,6 +196,10 @@ class MockPeerConnectionInternal : public PeerConnectionInternal {
               (override));
   MOCK_METHOD(PeerConnectionState, peer_connection_state, (), (override));
   MOCK_METHOD(IceGatheringState, ice_gathering_state, (), (override));
+  MOCK_METHOD(void,
+              AddAdaptationResource,
+              (rtc::scoped_refptr<Resource>),
+              (override));
   MOCK_METHOD(absl::optional<bool>, can_trickle_ice_candidates, (), (override));
   MOCK_METHOD(bool,
               StartRtcEventLog,