diff --git a/api/BUILD.gn b/api/BUILD.gn
index c14c412..8d3ee8f 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -785,10 +785,7 @@
 
   rtc_library("mock_frame_encryptor") {
     testonly = true
-    sources = [
-      "test/mock_frame_encryptor.cc",
-      "test/mock_frame_encryptor.h",
-    ]
+    sources = [ "test/mock_frame_encryptor.h" ]
     deps = [
       # For api/crypto/frame_encryptor_interface.h
       ":libjingle_peerconnection_api",
@@ -799,10 +796,7 @@
 
   rtc_library("mock_frame_decryptor") {
     testonly = true
-    sources = [
-      "test/mock_frame_decryptor.cc",
-      "test/mock_frame_decryptor.h",
-    ]
+    sources = [ "test/mock_frame_decryptor.h" ]
     deps = [
       ":libjingle_peerconnection_api",
       "../test:test_support",
@@ -917,10 +911,7 @@
     visibility = [ "*" ]
 
     testonly = true
-    sources = [
-      "test/mock_video_decoder.cc",
-      "test/mock_video_decoder.h",
-    ]
+    sources = [ "test/mock_video_decoder.h" ]
 
     deps = [
       "../api/video_codecs:video_codecs_api",
@@ -932,10 +923,7 @@
     visibility = [ "*" ]
 
     testonly = true
-    sources = [
-      "test/mock_video_encoder.cc",
-      "test/mock_video_encoder.h",
-    ]
+    sources = [ "test/mock_video_encoder.h" ]
 
     deps = [
       "../api/video_codecs:video_codecs_api",
diff --git a/api/test/mock_audio_mixer.h b/api/test/mock_audio_mixer.h
index bb303e2..aee717b 100644
--- a/api/test/mock_audio_mixer.h
+++ b/api/test/mock_audio_mixer.h
@@ -19,11 +19,12 @@
 
 class MockAudioMixer : public AudioMixer {
  public:
-  MOCK_METHOD1(AddSource, bool(Source* audio_source));
-  MOCK_METHOD1(RemoveSource, void(Source* audio_source));
-  MOCK_METHOD2(Mix,
-               void(size_t number_of_channels,
-                    AudioFrame* audio_frame_for_mixing));
+  MOCK_METHOD(bool, AddSource, (Source * audio_source), (override));
+  MOCK_METHOD(void, RemoveSource, (Source * audio_source), (override));
+  MOCK_METHOD(void,
+              Mix,
+              (size_t number_of_channels, AudioFrame* audio_frame_for_mixing),
+              (override));
 };
 }  // namespace test
 }  // namespace webrtc
diff --git a/api/test/mock_fec_controller_override.h b/api/test/mock_fec_controller_override.h
index a7ec836..8f3accb 100644
--- a/api/test/mock_fec_controller_override.h
+++ b/api/test/mock_fec_controller_override.h
@@ -18,9 +18,7 @@
 
 class MockFecControllerOverride : public FecControllerOverride {
  public:
-  ~MockFecControllerOverride() override = default;
-
-  MOCK_METHOD1(SetFecAllowed, void(bool fec_allowed));
+  MOCK_METHOD(void, SetFecAllowed, (bool fec_allowed), (override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_frame_decryptor.cc b/api/test/mock_frame_decryptor.cc
deleted file mode 100644
index f4b54f9..0000000
--- a/api/test/mock_frame_decryptor.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "api/test/mock_frame_decryptor.h"
-
-namespace webrtc {
-
-MockFrameDecryptor::MockFrameDecryptor() = default;
-MockFrameDecryptor::~MockFrameDecryptor() = default;
-
-}  // namespace webrtc
diff --git a/api/test/mock_frame_decryptor.h b/api/test/mock_frame_decryptor.h
index 77aa4f9..9604b96 100644
--- a/api/test/mock_frame_decryptor.h
+++ b/api/test/mock_frame_decryptor.h
@@ -20,18 +20,19 @@
 
 class MockFrameDecryptor : public FrameDecryptorInterface {
  public:
-  MockFrameDecryptor();
-  ~MockFrameDecryptor() override;
+  MOCK_METHOD(Result,
+              Decrypt,
+              (cricket::MediaType,
+               const std::vector<uint32_t>&,
+               rtc::ArrayView<const uint8_t>,
+               rtc::ArrayView<const uint8_t>,
+               rtc::ArrayView<uint8_t>),
+              (override));
 
-  MOCK_METHOD5(Decrypt,
-               Result(cricket::MediaType,
-                      const std::vector<uint32_t>&,
-                      rtc::ArrayView<const uint8_t>,
-                      rtc::ArrayView<const uint8_t>,
-                      rtc::ArrayView<uint8_t>));
-
-  MOCK_METHOD2(GetMaxPlaintextByteSize,
-               size_t(cricket::MediaType, size_t encrypted_frame_size));
+  MOCK_METHOD(size_t,
+              GetMaxPlaintextByteSize,
+              (cricket::MediaType, size_t encrypted_frame_size),
+              (override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_frame_encryptor.cc b/api/test/mock_frame_encryptor.cc
deleted file mode 100644
index 6c05efd..0000000
--- a/api/test/mock_frame_encryptor.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "api/test/mock_frame_encryptor.h"
-
-#include "test/gmock.h"
-
-namespace webrtc {
-
-MockFrameEncryptor::MockFrameEncryptor() = default;
-MockFrameEncryptor::~MockFrameEncryptor() = default;
-
-}  // namespace webrtc
diff --git a/api/test/mock_frame_encryptor.h b/api/test/mock_frame_encryptor.h
index 44b5e34..e47321f 100644
--- a/api/test/mock_frame_encryptor.h
+++ b/api/test/mock_frame_encryptor.h
@@ -18,19 +18,20 @@
 
 class MockFrameEncryptor : public FrameEncryptorInterface {
  public:
-  MockFrameEncryptor();
-  ~MockFrameEncryptor() override;
+  MOCK_METHOD(int,
+              Encrypt,
+              (cricket::MediaType,
+               uint32_t,
+               rtc::ArrayView<const uint8_t>,
+               rtc::ArrayView<const uint8_t>,
+               rtc::ArrayView<uint8_t>,
+               size_t*),
+              (override));
 
-  MOCK_METHOD6(Encrypt,
-               int(cricket::MediaType,
-                   uint32_t,
-                   rtc::ArrayView<const uint8_t>,
-                   rtc::ArrayView<const uint8_t>,
-                   rtc::ArrayView<uint8_t>,
-                   size_t*));
-
-  MOCK_METHOD2(GetMaxCiphertextByteSize,
-               size_t(cricket::MediaType media_type, size_t frame_size));
+  MOCK_METHOD(size_t,
+              GetMaxCiphertextByteSize,
+              (cricket::MediaType media_type, size_t frame_size),
+              (override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_peerconnectioninterface.h b/api/test/mock_peerconnectioninterface.h
index 4e0a74e..6b247b7 100644
--- a/api/test/mock_peerconnectioninterface.h
+++ b/api/test/mock_peerconnectioninterface.h
@@ -27,112 +27,172 @@
     : public rtc::RefCountedObject<webrtc::PeerConnectionInterface> {
  public:
   // PeerConnectionInterface
-  MOCK_METHOD0(local_streams, rtc::scoped_refptr<StreamCollectionInterface>());
-  MOCK_METHOD0(remote_streams, rtc::scoped_refptr<StreamCollectionInterface>());
-  MOCK_METHOD1(AddStream, bool(MediaStreamInterface*));
-  MOCK_METHOD1(RemoveStream, void(MediaStreamInterface*));
-  MOCK_METHOD2(AddTrack,
-               RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>>(
-                   rtc::scoped_refptr<MediaStreamTrackInterface>,
-                   const std::vector<std::string>&));
-  MOCK_METHOD2(AddTrack,
-               rtc::scoped_refptr<RtpSenderInterface>(
-                   MediaStreamTrackInterface*,
-                   std::vector<MediaStreamInterface*>));
-  MOCK_METHOD1(RemoveTrack, bool(RtpSenderInterface*));
-  MOCK_METHOD1(RemoveTrackNew,
-               RTCError(rtc::scoped_refptr<RtpSenderInterface>));
-  MOCK_METHOD1(AddTransceiver,
-               RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>(
-                   rtc::scoped_refptr<MediaStreamTrackInterface>));
-  MOCK_METHOD2(AddTransceiver,
-               RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>(
-                   rtc::scoped_refptr<MediaStreamTrackInterface>,
-                   const RtpTransceiverInit&));
-  MOCK_METHOD1(AddTransceiver,
-               RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>(
-                   cricket::MediaType));
-  MOCK_METHOD2(AddTransceiver,
-               RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>(
-                   cricket::MediaType,
-                   const RtpTransceiverInit&));
-  MOCK_METHOD2(CreateSender,
-               rtc::scoped_refptr<RtpSenderInterface>(const std::string&,
-                                                      const std::string&));
-  MOCK_CONST_METHOD0(GetSenders,
-                     std::vector<rtc::scoped_refptr<RtpSenderInterface>>());
-  MOCK_CONST_METHOD0(GetReceivers,
-                     std::vector<rtc::scoped_refptr<RtpReceiverInterface>>());
-  MOCK_CONST_METHOD0(
-      GetTransceivers,
-      std::vector<rtc::scoped_refptr<RtpTransceiverInterface>>());
-  MOCK_METHOD3(GetStats,
-               bool(StatsObserver*,
-                    MediaStreamTrackInterface*,
-                    StatsOutputLevel));
-  MOCK_METHOD1(GetStats, void(RTCStatsCollectorCallback*));
-  MOCK_METHOD2(GetStats,
-               void(rtc::scoped_refptr<RtpSenderInterface>,
-                    rtc::scoped_refptr<RTCStatsCollectorCallback>));
-  MOCK_METHOD2(GetStats,
-               void(rtc::scoped_refptr<RtpReceiverInterface>,
-                    rtc::scoped_refptr<RTCStatsCollectorCallback>));
-  MOCK_METHOD0(ClearStatsCache, void());
-  MOCK_CONST_METHOD0(GetSctpTransport,
-                     rtc::scoped_refptr<SctpTransportInterface>());
-  MOCK_METHOD2(
-      CreateDataChannel,
-      rtc::scoped_refptr<DataChannelInterface>(const std::string&,
-                                               const DataChannelInit*));
-  MOCK_CONST_METHOD0(local_description, const SessionDescriptionInterface*());
-  MOCK_CONST_METHOD0(remote_description, const SessionDescriptionInterface*());
-  MOCK_CONST_METHOD0(current_local_description,
-                     const SessionDescriptionInterface*());
-  MOCK_CONST_METHOD0(current_remote_description,
-                     const SessionDescriptionInterface*());
-  MOCK_CONST_METHOD0(pending_local_description,
-                     const SessionDescriptionInterface*());
-  MOCK_CONST_METHOD0(pending_remote_description,
-                     const SessionDescriptionInterface*());
-  MOCK_METHOD0(RestartIce, void());
-  MOCK_METHOD2(CreateOffer,
-               void(CreateSessionDescriptionObserver*,
-                    const RTCOfferAnswerOptions&));
-  MOCK_METHOD2(CreateAnswer,
-               void(CreateSessionDescriptionObserver*,
-                    const RTCOfferAnswerOptions&));
-  MOCK_METHOD2(SetLocalDescription,
-               void(SetSessionDescriptionObserver*,
-                    SessionDescriptionInterface*));
-  MOCK_METHOD2(SetRemoteDescription,
-               void(SetSessionDescriptionObserver*,
-                    SessionDescriptionInterface*));
-  MOCK_METHOD2(SetRemoteDescription,
-               void(std::unique_ptr<SessionDescriptionInterface>,
-                    rtc::scoped_refptr<SetRemoteDescriptionObserverInterface>));
-  MOCK_METHOD0(GetConfiguration, PeerConnectionInterface::RTCConfiguration());
-  MOCK_METHOD1(SetConfiguration,
-               RTCError(const PeerConnectionInterface::RTCConfiguration&));
-  MOCK_METHOD1(AddIceCandidate, bool(const IceCandidateInterface*));
-  MOCK_METHOD1(RemoveIceCandidates,
-               bool(const std::vector<cricket::Candidate>&));
-  MOCK_METHOD1(SetBitrate, RTCError(const BitrateSettings&));
-  MOCK_METHOD1(SetBitrate, RTCError(const BitrateParameters&));
-  MOCK_METHOD1(SetAudioPlayout, void(bool));
-  MOCK_METHOD1(SetAudioRecording, void(bool));
-  MOCK_METHOD1(LookupDtlsTransportByMid,
-               rtc::scoped_refptr<DtlsTransportInterface>(const std::string&));
-  MOCK_METHOD0(signaling_state, SignalingState());
-  MOCK_METHOD0(ice_connection_state, IceConnectionState());
-  MOCK_METHOD0(standardized_ice_connection_state, IceConnectionState());
-  MOCK_METHOD0(peer_connection_state, PeerConnectionState());
-  MOCK_METHOD0(ice_gathering_state, IceGatheringState());
-  MOCK_METHOD0(can_trickle_ice_candidates, absl::optional<bool>());
-  MOCK_METHOD2(StartRtcEventLog,
-               bool(std::unique_ptr<RtcEventLogOutput>, int64_t));
-  MOCK_METHOD1(StartRtcEventLog, bool(std::unique_ptr<RtcEventLogOutput>));
-  MOCK_METHOD0(StopRtcEventLog, void());
-  MOCK_METHOD0(Close, void());
+  MOCK_METHOD(rtc::scoped_refptr<StreamCollectionInterface>,
+              local_streams,
+              (),
+              (override));
+  MOCK_METHOD(rtc::scoped_refptr<StreamCollectionInterface>,
+              remote_streams,
+              (),
+              (override));
+  MOCK_METHOD(bool, AddStream, (MediaStreamInterface*), (override));
+  MOCK_METHOD(void, RemoveStream, (MediaStreamInterface*), (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>>,
+              AddTrack,
+              (rtc::scoped_refptr<MediaStreamTrackInterface>,
+               const std::vector<std::string>&),
+              (override));
+  MOCK_METHOD(bool, RemoveTrack, (RtpSenderInterface*), (override));
+  MOCK_METHOD(RTCError,
+              RemoveTrackNew,
+              (rtc::scoped_refptr<RtpSenderInterface>),
+              (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>,
+              AddTransceiver,
+              (rtc::scoped_refptr<MediaStreamTrackInterface>),
+              (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>,
+              AddTransceiver,
+              (rtc::scoped_refptr<MediaStreamTrackInterface>,
+               const RtpTransceiverInit&),
+              (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>,
+              AddTransceiver,
+              (cricket::MediaType),
+              (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>,
+              AddTransceiver,
+              (cricket::MediaType, const RtpTransceiverInit&),
+              (override));
+  MOCK_METHOD(rtc::scoped_refptr<RtpSenderInterface>,
+              CreateSender,
+              (const std::string&, const std::string&),
+              (override));
+  MOCK_METHOD(std::vector<rtc::scoped_refptr<RtpSenderInterface>>,
+              GetSenders,
+              (),
+              (const override));
+  MOCK_METHOD(std::vector<rtc::scoped_refptr<RtpReceiverInterface>>,
+              GetReceivers,
+              (),
+              (const override));
+  MOCK_METHOD(std::vector<rtc::scoped_refptr<RtpTransceiverInterface>>,
+              GetTransceivers,
+              (),
+              (const override));
+  MOCK_METHOD(bool,
+              GetStats,
+              (StatsObserver*, MediaStreamTrackInterface*, StatsOutputLevel),
+              (override));
+  MOCK_METHOD(void, GetStats, (RTCStatsCollectorCallback*), (override));
+  MOCK_METHOD(void,
+              GetStats,
+              (rtc::scoped_refptr<RtpSenderInterface>,
+               rtc::scoped_refptr<RTCStatsCollectorCallback>),
+              (override));
+  MOCK_METHOD(void,
+              GetStats,
+              (rtc::scoped_refptr<RtpReceiverInterface>,
+               rtc::scoped_refptr<RTCStatsCollectorCallback>),
+              (override));
+  MOCK_METHOD(void, ClearStatsCache, (), (override));
+  MOCK_METHOD(rtc::scoped_refptr<SctpTransportInterface>,
+              GetSctpTransport,
+              (),
+              (const override));
+  MOCK_METHOD(rtc::scoped_refptr<DataChannelInterface>,
+              CreateDataChannel,
+              (const std::string&, const DataChannelInit*),
+              (override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              local_description,
+              (),
+              (const override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              remote_description,
+              (),
+              (const override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              current_local_description,
+              (),
+              (const override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              current_remote_description,
+              (),
+              (const override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              pending_local_description,
+              (),
+              (const override));
+  MOCK_METHOD(const SessionDescriptionInterface*,
+              pending_remote_description,
+              (),
+              (const override));
+  MOCK_METHOD(void, RestartIce, (), (override));
+  MOCK_METHOD(void,
+              CreateOffer,
+              (CreateSessionDescriptionObserver*, const RTCOfferAnswerOptions&),
+              (override));
+  MOCK_METHOD(void,
+              CreateAnswer,
+              (CreateSessionDescriptionObserver*, const RTCOfferAnswerOptions&),
+              (override));
+  MOCK_METHOD(void,
+              SetLocalDescription,
+              (SetSessionDescriptionObserver*, SessionDescriptionInterface*),
+              (override));
+  MOCK_METHOD(void,
+              SetRemoteDescription,
+              (SetSessionDescriptionObserver*, SessionDescriptionInterface*),
+              (override));
+  MOCK_METHOD(void,
+              SetRemoteDescription,
+              (std::unique_ptr<SessionDescriptionInterface>,
+               rtc::scoped_refptr<SetRemoteDescriptionObserverInterface>),
+              (override));
+  MOCK_METHOD(PeerConnectionInterface::RTCConfiguration,
+              GetConfiguration,
+              (),
+              (override));
+  MOCK_METHOD(RTCError,
+              SetConfiguration,
+              (const PeerConnectionInterface::RTCConfiguration&),
+              (override));
+  MOCK_METHOD(bool,
+              AddIceCandidate,
+              (const IceCandidateInterface*),
+              (override));
+  MOCK_METHOD(bool,
+              RemoveIceCandidates,
+              (const std::vector<cricket::Candidate>&),
+              (override));
+  MOCK_METHOD(RTCError, SetBitrate, (const BitrateSettings&), (override));
+  MOCK_METHOD(RTCError, SetBitrate, (const BitrateParameters&), (override));
+  MOCK_METHOD(void, SetAudioPlayout, (bool), (override));
+  MOCK_METHOD(void, SetAudioRecording, (bool), (override));
+  MOCK_METHOD(rtc::scoped_refptr<DtlsTransportInterface>,
+              LookupDtlsTransportByMid,
+              (const std::string&),
+              (override));
+  MOCK_METHOD(SignalingState, signaling_state, (), (override));
+  MOCK_METHOD(IceConnectionState, ice_connection_state, (), (override));
+  MOCK_METHOD(IceConnectionState,
+              standardized_ice_connection_state,
+              (),
+              (override));
+  MOCK_METHOD(PeerConnectionState, peer_connection_state, (), (override));
+  MOCK_METHOD(IceGatheringState, ice_gathering_state, (), (override));
+  MOCK_METHOD(absl::optional<bool>, can_trickle_ice_candidates, (), (override));
+  MOCK_METHOD(bool,
+              StartRtcEventLog,
+              (std::unique_ptr<RtcEventLogOutput>, int64_t),
+              (override));
+  MOCK_METHOD(bool,
+              StartRtcEventLog,
+              (std::unique_ptr<RtcEventLogOutput>),
+              (override));
+  MOCK_METHOD(void, StopRtcEventLog, (), (override));
+  MOCK_METHOD(void, Close, (), (override));
 };
 
 static_assert(!std::is_abstract<MockPeerConnectionInterface>::value, "");
diff --git a/api/test/mock_rtpreceiver.h b/api/test/mock_rtpreceiver.h
index d4da908..a0b79e0 100644
--- a/api/test/mock_rtpreceiver.h
+++ b/api/test/mock_rtpreceiver.h
@@ -21,16 +21,23 @@
 
 class MockRtpReceiver : public rtc::RefCountedObject<RtpReceiverInterface> {
  public:
-  MOCK_METHOD1(SetTrack, void(MediaStreamTrackInterface*));
-  MOCK_CONST_METHOD0(track, rtc::scoped_refptr<MediaStreamTrackInterface>());
-  MOCK_CONST_METHOD0(streams,
-                     std::vector<rtc::scoped_refptr<MediaStreamInterface>>());
-  MOCK_CONST_METHOD0(media_type, cricket::MediaType());
-  MOCK_CONST_METHOD0(id, std::string());
-  MOCK_CONST_METHOD0(GetParameters, RtpParameters());
-  MOCK_METHOD1(SetObserver, void(RtpReceiverObserverInterface*));
-  MOCK_METHOD1(SetJitterBufferMinimumDelay, void(absl::optional<double>));
-  MOCK_CONST_METHOD0(GetSources, std::vector<RtpSource>());
+  MOCK_METHOD(rtc::scoped_refptr<MediaStreamTrackInterface>,
+              track,
+              (),
+              (const override));
+  MOCK_METHOD(std::vector<rtc::scoped_refptr<MediaStreamInterface>>,
+              streams,
+              (),
+              (const override));
+  MOCK_METHOD(cricket::MediaType, media_type, (), (const override));
+  MOCK_METHOD(std::string, id, (), (const override));
+  MOCK_METHOD(RtpParameters, GetParameters, (), (const override));
+  MOCK_METHOD(void, SetObserver, (RtpReceiverObserverInterface*), (override));
+  MOCK_METHOD(void,
+              SetJitterBufferMinimumDelay,
+              (absl::optional<double>),
+              (override));
+  MOCK_METHOD(std::vector<RtpSource>, GetSources, (), (const override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_rtpsender.h b/api/test/mock_rtpsender.h
index 6a656ea..f12a618 100644
--- a/api/test/mock_rtpsender.h
+++ b/api/test/mock_rtpsender.h
@@ -21,16 +21,25 @@
 
 class MockRtpSender : public rtc::RefCountedObject<RtpSenderInterface> {
  public:
-  MOCK_METHOD1(SetTrack, bool(MediaStreamTrackInterface*));
-  MOCK_CONST_METHOD0(track, rtc::scoped_refptr<MediaStreamTrackInterface>());
-  MOCK_CONST_METHOD0(ssrc, uint32_t());
-  MOCK_CONST_METHOD0(media_type, cricket::MediaType());
-  MOCK_CONST_METHOD0(id, std::string());
-  MOCK_CONST_METHOD0(stream_ids, std::vector<std::string>());
-  MOCK_CONST_METHOD0(init_send_encodings, std::vector<RtpEncodingParameters>());
-  MOCK_CONST_METHOD0(GetParameters, RtpParameters());
-  MOCK_METHOD1(SetParameters, RTCError(const RtpParameters&));
-  MOCK_CONST_METHOD0(GetDtmfSender, rtc::scoped_refptr<DtmfSenderInterface>());
+  MOCK_METHOD(bool, SetTrack, (MediaStreamTrackInterface*), (override));
+  MOCK_METHOD(rtc::scoped_refptr<MediaStreamTrackInterface>,
+              track,
+              (),
+              (const override));
+  MOCK_METHOD(uint32_t, ssrc, (), (const override));
+  MOCK_METHOD(cricket::MediaType, media_type, (), (const override));
+  MOCK_METHOD(std::string, id, (), (const override));
+  MOCK_METHOD(std::vector<std::string>, stream_ids, (), (const override));
+  MOCK_METHOD(std::vector<RtpEncodingParameters>,
+              init_send_encodings,
+              (),
+              (const override));
+  MOCK_METHOD(RtpParameters, GetParameters, (), (const override));
+  MOCK_METHOD(RTCError, SetParameters, (const RtpParameters&), (override));
+  MOCK_METHOD(rtc::scoped_refptr<DtmfSenderInterface>,
+              GetDtmfSender,
+              (),
+              (const override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_video_bitrate_allocator.h b/api/test/mock_video_bitrate_allocator.h
index 5d21d91..76cf49e 100644
--- a/api/test/mock_video_bitrate_allocator.h
+++ b/api/test/mock_video_bitrate_allocator.h
@@ -17,10 +17,10 @@
 namespace webrtc {
 
 class MockVideoBitrateAllocator : public webrtc::VideoBitrateAllocator {
-  MOCK_METHOD1(
-      Allocate,
-      VideoBitrateAllocation(VideoBitrateAllocationParameters parameters));
-  MOCK_METHOD1(GetPreferredBitrateBps, uint32_t(uint32_t framerate));
+  MOCK_METHOD(VideoBitrateAllocation,
+              Allocate,
+              (VideoBitrateAllocationParameters parameters),
+              (override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_video_bitrate_allocator_factory.h b/api/test/mock_video_bitrate_allocator_factory.h
index 0cae061..c7d883a 100644
--- a/api/test/mock_video_bitrate_allocator_factory.h
+++ b/api/test/mock_video_bitrate_allocator_factory.h
@@ -21,15 +21,12 @@
 class MockVideoBitrateAllocatorFactory
     : public webrtc::VideoBitrateAllocatorFactory {
  public:
-  virtual std::unique_ptr<VideoBitrateAllocator> CreateVideoBitrateAllocator(
-      const VideoCodec& codec) {
-    return std::unique_ptr<VideoBitrateAllocator>(
-        CreateVideoBitrateAllocatorProxy(codec));
-  }
-  ~MockVideoBitrateAllocatorFactory() { Die(); }
-  MOCK_METHOD1(CreateVideoBitrateAllocatorProxy,
-               VideoBitrateAllocator*(const VideoCodec&));
-  MOCK_METHOD0(Die, void());
+  ~MockVideoBitrateAllocatorFactory() override { Die(); }
+  MOCK_METHOD(std::unique_ptr<VideoBitrateAllocator>,
+              CreateVideoBitrateAllocator,
+              (const VideoCodec&),
+              (override));
+  MOCK_METHOD(void, Die, (), ());
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_video_decoder.cc b/api/test/mock_video_decoder.cc
deleted file mode 100644
index 85ed0e1..0000000
--- a/api/test/mock_video_decoder.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "api/test/mock_video_decoder.h"
-
-namespace webrtc {
-
-MockDecodedImageCallback::MockDecodedImageCallback() = default;
-MockDecodedImageCallback::~MockDecodedImageCallback() = default;
-MockVideoDecoder::MockVideoDecoder() = default;
-MockVideoDecoder::~MockVideoDecoder() = default;
-
-}  // namespace webrtc
diff --git a/api/test/mock_video_decoder.h b/api/test/mock_video_decoder.h
index e7d4209..faadabc 100644
--- a/api/test/mock_video_decoder.h
+++ b/api/test/mock_video_decoder.h
@@ -18,34 +18,40 @@
 
 class MockDecodedImageCallback : public DecodedImageCallback {
  public:
-  MockDecodedImageCallback();
-  ~MockDecodedImageCallback() override;
-
-  MOCK_METHOD1(Decoded, int32_t(VideoFrame& decodedImage));  // NOLINT
-  MOCK_METHOD2(Decoded,
-               int32_t(VideoFrame& decodedImage,  // NOLINT
-                       int64_t decode_time_ms));
-  MOCK_METHOD3(Decoded,
-               void(VideoFrame& decodedImage,  // NOLINT
-                    absl::optional<int32_t> decode_time_ms,
-                    absl::optional<uint8_t> qp));
+  MOCK_METHOD(int32_t,
+              Decoded,
+              (VideoFrame & decoded_image),  // NOLINT
+              (override));
+  MOCK_METHOD(int32_t,
+              Decoded,
+              (VideoFrame & decoded_image,  // NOLINT
+               int64_t decode_time_ms),
+              (override));
+  MOCK_METHOD(void,
+              Decoded,
+              (VideoFrame & decoded_image,  // NOLINT
+               absl::optional<int32_t> decode_time_ms,
+               absl::optional<uint8_t> qp),
+              (override));
 };
 
 class MockVideoDecoder : public VideoDecoder {
  public:
-  MockVideoDecoder();
-  ~MockVideoDecoder() override;
-
-  MOCK_METHOD2(InitDecode,
-               int32_t(const VideoCodec* codecSettings, int32_t numberOfCores));
-  MOCK_METHOD3(Decode,
-               int32_t(const EncodedImage& inputImage,
-                       bool missingFrames,
-                       int64_t renderTimeMs));
-  MOCK_METHOD1(RegisterDecodeCompleteCallback,
-               int32_t(DecodedImageCallback* callback));
-  MOCK_METHOD0(Release, int32_t());
-  MOCK_METHOD0(Copy, VideoDecoder*());
+  MOCK_METHOD(int32_t,
+              InitDecode,
+              (const VideoCodec* codec_settings, int32_t number_of_cores),
+              (override));
+  MOCK_METHOD(int32_t,
+              Decode,
+              (const EncodedImage& input_image,
+               bool missing_frames,
+               int64_t render_time_ms),
+              (override));
+  MOCK_METHOD(int32_t,
+              RegisterDecodeCompleteCallback,
+              (DecodedImageCallback * callback),
+              (override));
+  MOCK_METHOD(int32_t, Release, (), (override));
 };
 
 }  // namespace webrtc
diff --git a/api/test/mock_video_encoder.cc b/api/test/mock_video_encoder.cc
deleted file mode 100644
index a0d82b1..0000000
--- a/api/test/mock_video_encoder.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "api/test/mock_video_encoder.h"
-
-namespace webrtc {
-
-MockEncodedImageCallback::MockEncodedImageCallback() = default;
-MockEncodedImageCallback::~MockEncodedImageCallback() = default;
-MockVideoEncoder::MockVideoEncoder() = default;
-MockVideoEncoder::~MockVideoEncoder() = default;
-
-}  // namespace webrtc
diff --git a/api/test/mock_video_encoder.h b/api/test/mock_video_encoder.h
index 34c038a..c4b6b3e 100644
--- a/api/test/mock_video_encoder.h
+++ b/api/test/mock_video_encoder.h
@@ -20,25 +20,27 @@
 
 class MockEncodedImageCallback : public EncodedImageCallback {
  public:
-  MockEncodedImageCallback();
-  ~MockEncodedImageCallback();
-  MOCK_METHOD3(OnEncodedImage,
-               Result(const EncodedImage& encodedImage,
-                      const CodecSpecificInfo* codecSpecificInfo,
-                      const RTPFragmentationHeader* fragmentation));
+  MOCK_METHOD(Result,
+              OnEncodedImage,
+              (const EncodedImage& encodedImage,
+               const CodecSpecificInfo* codecSpecificInfo,
+               const RTPFragmentationHeader* fragmentation),
+              (override));
+  MOCK_METHOD(void, OnDroppedFrame, (DropReason reason), (override));
 };
 
 class MockVideoEncoder : public VideoEncoder {
  public:
-  MockVideoEncoder();
-  ~MockVideoEncoder();
-  MOCK_METHOD1(SetFecControllerOverride,
-               void(FecControllerOverride* fec_controller_override));
-  MOCK_CONST_METHOD2(Version, int32_t(int8_t* version, int32_t length));
-  MOCK_METHOD3(InitEncode,
-               int32_t(const VideoCodec* codecSettings,
-                       int32_t numberOfCores,
-                       size_t maxPayloadSize));
+  MOCK_METHOD(void,
+              SetFecControllerOverride,
+              (FecControllerOverride * fec_controller_override),
+              (override));
+  MOCK_METHOD(int32_t,
+              InitEncode,
+              (const VideoCodec* codecSettings,
+               int32_t numberOfCores,
+               size_t maxPayloadSize),
+              (override));
   MOCK_METHOD2(InitEncode,
                int32_t(const VideoCodec* codecSettings,
                        const VideoEncoder::Settings& settings));
diff --git a/media/engine/webrtc_video_engine_unittest.cc b/media/engine/webrtc_video_engine_unittest.cc
index a3ea951..ce36073 100644
--- a/media/engine/webrtc_video_engine_unittest.cc
+++ b/media/engine/webrtc_video_engine_unittest.cc
@@ -1082,9 +1082,10 @@
       rate_allocator_factory =
           std::make_unique<webrtc::MockVideoBitrateAllocatorFactory>();
   EXPECT_CALL(*rate_allocator_factory,
-              CreateVideoBitrateAllocatorProxy(Field(
-                  &webrtc::VideoCodec::codecType, webrtc::kVideoCodecVP8)))
-      .WillOnce(Return(new webrtc::MockVideoBitrateAllocator()));
+              CreateVideoBitrateAllocator(Field(&webrtc::VideoCodec::codecType,
+                                                webrtc::kVideoCodecVP8)))
+      .WillOnce(
+          [] { return std::make_unique<webrtc::MockVideoBitrateAllocator>(); });
   WebRtcVideoEngine engine(
       (std::unique_ptr<webrtc::VideoEncoderFactory>(encoder_factory)),
       (std::unique_ptr<webrtc::VideoDecoderFactory>(decoder_factory)));