diff --git a/quiche/quic/core/http/http_decoder_test.cc b/quiche/quic/core/http/http_decoder_test.cc
index a6c13a1..3ea97ca 100644
--- a/quiche/quic/core/http/http_decoder_test.cc
+++ b/quiche/quic/core/http/http_decoder_test.cc
@@ -38,54 +38,6 @@
 
 namespace {
 
-class MockHttpDecoderVisitor : public HttpDecoder::Visitor {
- public:
-  ~MockHttpDecoderVisitor() override = default;
-
-  // Called if an error is detected.
-  MOCK_METHOD(void, OnError, (HttpDecoder*), (override));
-
-  MOCK_METHOD(bool, OnMaxPushIdFrame, (), (override));
-  MOCK_METHOD(bool, OnGoAwayFrame, (const GoAwayFrame& frame), (override));
-  MOCK_METHOD(bool, OnSettingsFrameStart, (QuicByteCount header_length),
-              (override));
-  MOCK_METHOD(bool, OnSettingsFrame, (const SettingsFrame& frame), (override));
-
-  MOCK_METHOD(bool, OnDataFrameStart,
-              (QuicByteCount header_length, QuicByteCount payload_length),
-              (override));
-  MOCK_METHOD(bool, OnDataFramePayload, (absl::string_view payload),
-              (override));
-  MOCK_METHOD(bool, OnDataFrameEnd, (), (override));
-
-  MOCK_METHOD(bool, OnHeadersFrameStart,
-              (QuicByteCount header_length, QuicByteCount payload_length),
-              (override));
-  MOCK_METHOD(bool, OnHeadersFramePayload, (absl::string_view payload),
-              (override));
-  MOCK_METHOD(bool, OnHeadersFrameEnd, (), (override));
-
-  MOCK_METHOD(bool, OnPriorityUpdateFrameStart, (QuicByteCount header_length),
-              (override));
-  MOCK_METHOD(bool, OnPriorityUpdateFrame, (const PriorityUpdateFrame& frame),
-              (override));
-
-  MOCK_METHOD(bool, OnAcceptChFrameStart, (QuicByteCount header_length),
-              (override));
-  MOCK_METHOD(bool, OnAcceptChFrame, (const AcceptChFrame& frame), (override));
-  MOCK_METHOD(void, OnWebTransportStreamFrameType,
-              (QuicByteCount header_length, WebTransportSessionId session_id),
-              (override));
-
-  MOCK_METHOD(bool, OnUnknownFrameStart,
-              (uint64_t frame_type, QuicByteCount header_length,
-               QuicByteCount payload_length),
-              (override));
-  MOCK_METHOD(bool, OnUnknownFramePayload, (absl::string_view payload),
-              (override));
-  MOCK_METHOD(bool, OnUnknownFrameEnd, (), (override));
-};
-
 class HttpDecoderTest : public QuicTest {
  public:
   HttpDecoderTest() : decoder_(&visitor_) {
diff --git a/quiche/quic/test_tools/quic_test_utils.h b/quiche/quic/test_tools/quic_test_utils.h
index 66f2c60..5e1397c 100644
--- a/quiche/quic/test_tools/quic_test_utils.h
+++ b/quiche/quic/test_tools/quic_test_utils.h
@@ -20,6 +20,7 @@
 #include "quiche/quic/core/congestion_control/loss_detection_interface.h"
 #include "quiche/quic/core/congestion_control/send_algorithm_interface.h"
 #include "quiche/quic/core/crypto/transport_parameters.h"
+#include "quiche/quic/core/http/http_decoder.h"
 #include "quiche/quic/core/http/quic_client_push_promise_index.h"
 #include "quiche/quic/core/http/quic_server_session_base.h"
 #include "quiche/quic/core/http/quic_spdy_session.h"
@@ -1441,6 +1442,54 @@
               (std::unique_ptr<QuicPathValidationContext>), (override));
 };
 
+class MockHttpDecoderVisitor : public HttpDecoder::Visitor {
+ public:
+  ~MockHttpDecoderVisitor() override = default;
+
+  // Called if an error is detected.
+  MOCK_METHOD(void, OnError, (HttpDecoder*), (override));
+
+  MOCK_METHOD(bool, OnMaxPushIdFrame, (), (override));
+  MOCK_METHOD(bool, OnGoAwayFrame, (const GoAwayFrame& frame), (override));
+  MOCK_METHOD(bool, OnSettingsFrameStart, (QuicByteCount header_length),
+              (override));
+  MOCK_METHOD(bool, OnSettingsFrame, (const SettingsFrame& frame), (override));
+
+  MOCK_METHOD(bool, OnDataFrameStart,
+              (QuicByteCount header_length, QuicByteCount payload_length),
+              (override));
+  MOCK_METHOD(bool, OnDataFramePayload, (absl::string_view payload),
+              (override));
+  MOCK_METHOD(bool, OnDataFrameEnd, (), (override));
+
+  MOCK_METHOD(bool, OnHeadersFrameStart,
+              (QuicByteCount header_length, QuicByteCount payload_length),
+              (override));
+  MOCK_METHOD(bool, OnHeadersFramePayload, (absl::string_view payload),
+              (override));
+  MOCK_METHOD(bool, OnHeadersFrameEnd, (), (override));
+
+  MOCK_METHOD(bool, OnPriorityUpdateFrameStart, (QuicByteCount header_length),
+              (override));
+  MOCK_METHOD(bool, OnPriorityUpdateFrame, (const PriorityUpdateFrame& frame),
+              (override));
+
+  MOCK_METHOD(bool, OnAcceptChFrameStart, (QuicByteCount header_length),
+              (override));
+  MOCK_METHOD(bool, OnAcceptChFrame, (const AcceptChFrame& frame), (override));
+  MOCK_METHOD(void, OnWebTransportStreamFrameType,
+              (QuicByteCount header_length, WebTransportSessionId session_id),
+              (override));
+
+  MOCK_METHOD(bool, OnUnknownFrameStart,
+              (uint64_t frame_type, QuicByteCount header_length,
+               QuicByteCount payload_length),
+              (override));
+  MOCK_METHOD(bool, OnUnknownFramePayload, (absl::string_view payload),
+              (override));
+  MOCK_METHOD(bool, OnUnknownFrameEnd, (), (override));
+};
+
 class QuicCryptoClientStreamPeer {
  public:
   QuicCryptoClientStreamPeer() = delete;