diff --git a/download_action_android_unittest.cc b/download_action_android_unittest.cc
new file mode 100644
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+++ b/download_action_android_unittest.cc
@@ -0,0 +1,90 @@
+//
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "common/mock_action_processor.h"
+#include <gmock/gmock-actions.h>
+#include <gmock/gmock-function-mocker.h>
+#include <gmock/gmock-spec-builders.h>
+
+#include "payload_consumer/install_plan.h"
+#include "update_engine/common/action_pipe.h"
+#include "update_engine/common/boot_control_stub.h"
+#include "update_engine/common/constants.h"
+#include "update_engine/common/download_action.h"
+#include "update_engine/common/mock_http_fetcher.h"
+#include "update_engine/common/mock_prefs.h"
+#include "update_engine/common/test_utils.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <memory>
+
+namespace chromeos_update_engine {
+using testing::_;
+using testing::DoAll;
+using testing::Return;
+using testing::SetArgPointee;
+
+class DownloadActionTest : public ::testing::Test {
+ public:
+  static constexpr int64_t METADATA_SIZE = 1024;
+  static constexpr int64_t SIGNATURE_SIZE = 256;
+  std::shared_ptr<ActionPipe<InstallPlan>> action_pipe{
+      new ActionPipe<InstallPlan>()};
+};
+
+TEST_F(DownloadActionTest, CacheManifestInvalid) {
+  std::string data(METADATA_SIZE + SIGNATURE_SIZE, '-');
+  MockPrefs prefs;
+  EXPECT_CALL(prefs, GetInt64(kPrefsUpdateStatePayloadIndex, _))
+      .WillRepeatedly(DoAll(SetArgPointee<1>(0L), Return(true)));
+  EXPECT_CALL(prefs, GetInt64(kPrefsManifestMetadataSize, _))
+      .WillRepeatedly(DoAll(SetArgPointee<1>(METADATA_SIZE), Return(true)));
+  EXPECT_CALL(prefs, GetInt64(kPrefsManifestSignatureSize, _))
+      .WillRepeatedly(DoAll(SetArgPointee<1>(SIGNATURE_SIZE), Return(true)));
+  EXPECT_CALL(prefs, GetInt64(kPrefsUpdateStateNextDataOffset, _))
+      .WillRepeatedly(DoAll(SetArgPointee<1>(0L), Return(true)));
+  EXPECT_CALL(prefs, GetString(kPrefsManifestBytes, _))
+      .WillRepeatedly(DoAll(SetArgPointee<1>(data), Return(true)));
+
+  BootControlStub boot_control;
+  MockHttpFetcher* http_fetcher =
+      new MockHttpFetcher(data.data(), data.size(), nullptr);
+  http_fetcher->set_delay(false);
+  InstallPlan install_plan;
+  auto& payload = install_plan.payloads.emplace_back();
+  install_plan.download_url = "http://fake_url.invalid";
+  payload.size = data.size();
+  payload.payload_urls.emplace_back("http://fake_url.invalid");
+  install_plan.is_resume = true;
+  action_pipe->set_contents(install_plan);
+
+  // takes ownership of passed in HttpFetcher
+  auto download_action =
+      std::make_unique<DownloadAction>(&prefs,
+                                       &boot_control,
+                                       nullptr,
+                                       nullptr,
+                                       http_fetcher,
+                                       false /* interactive */);
+  download_action->set_in_pipe(action_pipe);
+  MockActionProcessor mock_processor;
+  download_action->SetProcessor(&mock_processor);
+  download_action->PerformAction();
+  ASSERT_EQ(download_action->http_fetcher()->GetBytesDownloaded(), data.size());
+}
+
+}  // namespace chromeos_update_engine