diff --git a/video/BUILD.gn b/video/BUILD.gn
index f2f5c99e97..7d15d27c37 100644
--- a/video/BUILD.gn
+++ b/video/BUILD.gn
@@ -644,6 +644,7 @@ if (rtc_include_tests) {
       "../api:mock_fec_controller_override",
       "../api:mock_frame_decryptor",
       "../api:mock_video_codec_factory",
+      "../api:mock_video_decoder",
       "../api:mock_video_encoder",
       "../api:rtp_headers",
       "../api:rtp_parameters",
diff --git a/video/rtp_video_stream_receiver2_unittest.cc b/video/rtp_video_stream_receiver2_unittest.cc
index b5ae816345..b68ef4a1bc 100644
--- a/video/rtp_video_stream_receiver2_unittest.cc
+++ b/video/rtp_video_stream_receiver2_unittest.cc
@@ -16,6 +16,7 @@
 #include "api/task_queue/task_queue_base.h"
 #include "api/video/video_codec_type.h"
 #include "api/video/video_frame_type.h"
+#include "call/test/mock_rtp_packet_sink_interface.h"
 #include "common_video/h264/h264_common.h"
 #include "media/base/media_constants.h"
 #include "modules/rtp_rtcp/source/rtp_descriptor_authentication.h"
@@ -38,6 +39,7 @@
 #include "test/gmock.h"
 #include "test/gtest.h"
 #include "test/mock_frame_transformer.h"
+#include "test/mock_transport.h"
 #include "test/time_controller/simulated_task_queue.h"
 #include "test/time_controller/simulated_time_controller.h"
 
@@ -73,15 +75,6 @@ RTPVideoHeader GetGenericVideoHeader(VideoFrameType frame_type) {
   return video_header;
 }
 
-class MockTransport : public Transport {
- public:
-  MOCK_METHOD(bool,
-              SendRtp,
-              (const uint8_t*, size_t length, const PacketOptions& options),
-              (override));
-  MOCK_METHOD(bool, SendRtcp, (const uint8_t*, size_t length), (override));
-};
-
 class MockNackSender : public NackSender {
  public:
   MOCK_METHOD(void,
@@ -130,11 +123,6 @@ class MockOnCompleteFrameCallback
   rtc::ByteBufferWriter buffer_;
 };
 
-class MockRtpPacketSink : public RtpPacketSinkInterface {
- public:
-  MOCK_METHOD(void, OnRtpPacket, (const RtpPacketReceived&), (override));
-};
-
 constexpr uint32_t kSsrc = 111;
 constexpr int kPayloadType = 100;
 constexpr int kRedPayloadType = 125;
diff --git a/video/rtp_video_stream_receiver_unittest.cc b/video/rtp_video_stream_receiver_unittest.cc
index 901d6931bb..22cb37fa16 100644
--- a/video/rtp_video_stream_receiver_unittest.cc
+++ b/video/rtp_video_stream_receiver_unittest.cc
@@ -15,6 +15,7 @@
 
 #include "api/video/video_codec_type.h"
 #include "api/video/video_frame_type.h"
+#include "call/test/mock_rtp_packet_sink_interface.h"
 #include "common_video/h264/h264_common.h"
 #include "media/base/media_constants.h"
 #include "modules/rtp_rtcp/source/rtp_descriptor_authentication.h"
@@ -37,6 +38,7 @@
 #include "test/gmock.h"
 #include "test/gtest.h"
 #include "test/mock_frame_transformer.h"
+#include "test/mock_transport.h"
 
 using ::testing::_;
 using ::testing::ElementsAre;
@@ -70,15 +72,6 @@ RTPVideoHeader GetGenericVideoHeader(VideoFrameType frame_type) {
   return video_header;
 }
 
-class MockTransport : public Transport {
- public:
-  MOCK_METHOD(bool,
-              SendRtp,
-              (const uint8_t*, size_t length, const PacketOptions& options),
-              (override));
-  MOCK_METHOD(bool, SendRtcp, (const uint8_t*, size_t length), (override));
-};
-
 class MockNackSender : public NackSender {
  public:
   MOCK_METHOD(void,
@@ -127,11 +120,6 @@ class MockOnCompleteFrameCallback
   rtc::ByteBufferWriter buffer_;
 };
 
-class MockRtpPacketSink : public RtpPacketSinkInterface {
- public:
-  MOCK_METHOD(void, OnRtpPacket, (const RtpPacketReceived&), (override));
-};
-
 constexpr uint32_t kSsrc = 111;
 constexpr uint16_t kSequenceNumber = 222;
 constexpr int kPayloadType = 100;
diff --git a/video/video_receive_stream2_unittest.cc b/video/video_receive_stream2_unittest.cc
index 6fb42345ce..cc282d83fb 100644
--- a/video/video_receive_stream2_unittest.cc
+++ b/video/video_receive_stream2_unittest.cc
@@ -17,6 +17,8 @@
 #include <vector>
 
 #include "api/task_queue/default_task_queue_factory.h"
+#include "api/test/mock_video_decoder.h"
+#include "api/test/mock_video_decoder_factory.h"
 #include "api/test/video/function_video_decoder_factory.h"
 #include "api/video/video_frame.h"
 #include "api/video_codecs/video_decoder.h"
@@ -34,6 +36,7 @@
 #include "test/field_trial.h"
 #include "test/gmock.h"
 #include "test/gtest.h"
+#include "test/mock_transport.h"
 #include "test/run_loop.h"
 #include "test/time_controller/simulated_time_controller.h"
 #include "test/video_decoder_proxy_factory.h"
@@ -54,43 +57,6 @@ using ::testing::SizeIs;
 
 constexpr int kDefaultTimeOutMs = 50;
 
-class MockTransport : public Transport {
- public:
-  MOCK_METHOD(bool,
-              SendRtp,
-              (const uint8_t*, size_t length, const PacketOptions& options),
-              (override));
-  MOCK_METHOD(bool, SendRtcp, (const uint8_t*, size_t length), (override));
-};
-
-class MockVideoDecoder : public VideoDecoder {
- public:
-  MOCK_METHOD(int32_t,
-              InitDecode,
-              (const VideoCodec*, int32_t number_of_cores),
-              (override));
-  MOCK_METHOD(int32_t,
-              Decode,
-              (const EncodedImage& input,
-               bool missing_frames,
-               int64_t render_time_ms),
-              (override));
-  MOCK_METHOD(int32_t,
-              RegisterDecodeCompleteCallback,
-              (DecodedImageCallback*),
-              (override));
-  MOCK_METHOD(int32_t, Release, (), (override));
-  const char* ImplementationName() const { return "MockVideoDecoder"; }
-};
-
-class MockVideoDecoderFactory : public VideoDecoderFactory {
- public:
-  MOCK_CONST_METHOD0(GetSupportedFormats, std::vector<SdpVideoFormat>());
-
-  MOCK_METHOD1(CreateVideoDecoder,
-               std::unique_ptr<VideoDecoder>(const SdpVideoFormat& format));
-};
-
 class FrameObjectFake : public EncodedFrame {
  public:
   void SetPayloadType(uint8_t payload_type) { _payloadType = payload_type; }
diff --git a/video/video_receive_stream_unittest.cc b/video/video_receive_stream_unittest.cc
index d7398b8681..f3099d8de7 100644
--- a/video/video_receive_stream_unittest.cc
+++ b/video/video_receive_stream_unittest.cc
@@ -16,6 +16,7 @@
 #include <vector>
 
 #include "api/task_queue/default_task_queue_factory.h"
+#include "api/test/mock_video_decoder.h"
 #include "api/test/video/function_video_decoder_factory.h"
 #include "api/video_codecs/video_decoder.h"
 #include "call/rtp_stream_receiver_controller.h"
@@ -31,6 +32,7 @@
 #include "test/field_trial.h"
 #include "test/gmock.h"
 #include "test/gtest.h"
+#include "test/mock_transport.h"
 #include "test/time_controller/simulated_time_controller.h"
 #include "test/video_decoder_proxy_factory.h"
 #include "video/call_stats.h"
@@ -46,36 +48,6 @@ using ::testing::SizeIs;
 
 constexpr int kDefaultTimeOutMs = 50;
 
-class MockTransport : public Transport {
- public:
-  MOCK_METHOD(bool,
-              SendRtp,
-              (const uint8_t*, size_t length, const PacketOptions& options),
-              (override));
-  MOCK_METHOD(bool, SendRtcp, (const uint8_t*, size_t length), (override));
-};
-
-class MockVideoDecoder : public VideoDecoder {
- public:
-  MOCK_METHOD(int32_t,
-              InitDecode,
-              (const VideoCodec*, int32_t number_of_cores),
-              (override));
-  MOCK_METHOD(int32_t,
-              Decode,
-              (const EncodedImage& input,
-               bool missing_frames,
-               int64_t render_time_ms),
-              (override));
-  MOCK_METHOD(int32_t,
-              RegisterDecodeCompleteCallback,
-              (DecodedImageCallback*),
-              (override));
-  MOCK_METHOD(int32_t, Release, (), (override));
-  MOCK_METHOD(VideoDecoder::DecoderInfo, GetDetcoderInfo, (), (const override));
-  const char* ImplementationName() const { return "MockVideoDecoder"; }
-};
-
 class FrameObjectFake : public EncodedFrame {
  public:
   void SetPayloadType(uint8_t payload_type) { _payloadType = payload_type; }