diff --git a/http2/decoder/http2_structure_decoder_test_util.h b/http2/decoder/http2_structure_decoder_test_util.h
new file mode 100644
index 0000000..4b533c7
--- /dev/null
+++ b/http2/decoder/http2_structure_decoder_test_util.h
@@ -0,0 +1,24 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_HTTP2_DECODER_HTTP2_STRUCTURE_DECODER_TEST_UTIL_H_
+#define QUICHE_HTTP2_DECODER_HTTP2_STRUCTURE_DECODER_TEST_UTIL_H_
+
+#include "net/third_party/quiche/src/http2/decoder/http2_structure_decoder.h"
+
+#include "net/third_party/quiche/src/http2/test_tools/http2_random.h"
+
+namespace http2 {
+namespace test {
+
+class Http2StructureDecoderPeer {
+ public:
+  // Overwrite the Http2StructureDecoder instance with random values.
+  static void Randomize(Http2StructureDecoder* p, Http2Random* rng);
+};
+
+}  // namespace test
+}  // namespace http2
+
+#endif  // QUICHE_HTTP2_DECODER_HTTP2_STRUCTURE_DECODER_TEST_UTIL_H_