diff --git a/quiche/quic/test_tools/simple_session_cache.cc b/quiche/quic/test_tools/simple_session_cache.cc
new file mode 100644
index 0000000..eafead3
--- /dev/null
+++ b/quiche/quic/test_tools/simple_session_cache.cc
@@ -0,0 +1,76 @@
+// Copyright (c) 2019 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.
+
+#include "quiche/quic/test_tools/simple_session_cache.h"
+#include <memory>
+#include "quiche/quic/core/crypto/quic_crypto_client_config.h"
+
+namespace quic {
+namespace test {
+
+void SimpleSessionCache::Insert(const QuicServerId& server_id,
+                                bssl::UniquePtr<SSL_SESSION> session,
+                                const TransportParameters& params,
+                                const ApplicationState* application_state) {
+  auto it = cache_entries_.find(server_id);
+  if (it == cache_entries_.end()) {
+    it = cache_entries_.insert(std::make_pair(server_id, Entry())).first;
+  }
+  if (session != nullptr) {
+    it->second.session = std::move(session);
+  }
+  if (application_state != nullptr) {
+    it->second.application_state =
+        std::make_unique<ApplicationState>(*application_state);
+  }
+  it->second.params = std::make_unique<TransportParameters>(params);
+}
+
+std::unique_ptr<QuicResumptionState> SimpleSessionCache::Lookup(
+    const QuicServerId& server_id, QuicWallTime /*now*/,
+    const SSL_CTX* /*ctx*/) {
+  auto it = cache_entries_.find(server_id);
+  if (it == cache_entries_.end()) {
+    return nullptr;
+  }
+
+  if (!it->second.session) {
+    cache_entries_.erase(it);
+    return nullptr;
+  }
+
+  auto state = std::make_unique<QuicResumptionState>();
+  state->tls_session = std::move(it->second.session);
+  if (it->second.application_state != nullptr) {
+    state->application_state =
+        std::make_unique<ApplicationState>(*it->second.application_state);
+  }
+  state->transport_params =
+      std::make_unique<TransportParameters>(*it->second.params);
+  state->token = it->second.token;
+  return state;
+}
+
+void SimpleSessionCache::ClearEarlyData(const QuicServerId& /*server_id*/) {
+  // The simple session cache only stores 1 SSL ticket per entry, so no need to
+  // do anything here.
+}
+
+void SimpleSessionCache::OnNewTokenReceived(const QuicServerId& server_id,
+                                            absl::string_view token) {
+  auto it = cache_entries_.find(server_id);
+  if (it == cache_entries_.end()) {
+    return;
+  }
+  it->second.token = std::string(token);
+}
+
+void SimpleSessionCache::RemoveExpiredEntries(QuicWallTime /*now*/) {
+  // The simple session cache does not support removing expired entries.
+}
+
+void SimpleSessionCache::Clear() { cache_entries_.clear(); }
+
+}  // namespace test
+}  // namespace quic