diff --git a/update_attempter.cc b/update_attempter.cc
index b3cb3c3..8df8b61 100644
--- a/update_attempter.cc
+++ b/update_attempter.cc
@@ -163,7 +163,8 @@
       Bind(&UpdateAttempter::OnUpdateScheduled, base::Unretained(this));
   // We limit the async policy request to a reasonably short time, to avoid a
   // starvation due to a transient bug.
-  update_manager->AsyncPolicyRequest(callback, &Policy::UpdateCheckAllowed);
+  update_manager->AsyncPolicyRequestUpdateCheckAllowed(
+      callback, &Policy::UpdateCheckAllowed);
   waiting_for_scheduled_check_ = true;
   return true;
 }
diff --git a/update_attempter_unittest.cc b/update_attempter_unittest.cc
index 8b8e390..9421c19 100644
--- a/update_attempter_unittest.cc
+++ b/update_attempter_unittest.cc
@@ -53,10 +53,12 @@
 #include "update_engine/payload_consumer/payload_constants.h"
 #include "update_engine/payload_consumer/postinstall_runner_action.h"
 #include "update_engine/update_boot_flags_action.h"
+#include "update_engine/update_manager/mock_update_manager.h"
 
 using base::Time;
 using base::TimeDelta;
 using chromeos_update_manager::EvalStatus;
+using chromeos_update_manager::MockUpdateManager;
 using chromeos_update_manager::StagingSchedule;
 using chromeos_update_manager::UpdateCheckParams;
 using policy::DevicePolicy;
@@ -137,6 +139,7 @@
     fake_system_state_.set_connection_manager(&mock_connection_manager);
     fake_system_state_.set_update_attempter(&attempter_);
     fake_system_state_.set_dlcservice(&mock_dlcservice_);
+    fake_system_state_.set_update_manager(&mock_update_manager_);
     loop_.SetAsCurrent();
 
     certificate_checker_.Init();
@@ -222,6 +225,7 @@
   OpenSSLWrapper openssl_wrapper_;
   CertificateChecker certificate_checker_;
   MockDlcService mock_dlcservice_;
+  MockUpdateManager mock_update_manager_;
 
   NiceMock<MockActionProcessor>* processor_;
   NiceMock<MockPrefs>*
diff --git a/update_manager/mock_update_manager.h b/update_manager/mock_update_manager.h
new file mode 100644
index 0000000..07e4689
--- /dev/null
+++ b/update_manager/mock_update_manager.h
@@ -0,0 +1,44 @@
+//
+// Copyright (C) 2019 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.
+//
+
+#ifndef UPDATE_ENGINE_MOCK_UPDATE_MANAGER_H
+#define UPDATE_ENGINE_MOCK_UPDATE_MANAGER_H
+
+#include <string>
+
+#include "update_engine/update_manager/update_manager.h"
+
+#include <gmock/gmock.h>
+
+namespace chromeos_update_manager {
+
+class MockUpdateManager : public UpdateManager {
+ public:
+  MockUpdateManager()
+      : UpdateManager(nullptr, base::TimeDelta(), base::TimeDelta(), nullptr) {}
+
+  MOCK_METHOD2(
+      AsyncPolicyRequestUpdateCheckAllowed,
+      void(base::Callback<void(EvalStatus, const UpdateCheckParams& result)>
+               callback,
+           EvalStatus (Policy::*policy_method)(
+               EvaluationContext*, State*, std::string*, UpdateCheckParams*)
+               const));
+};
+
+}  // namespace chromeos_update_manager
+
+#endif  // UPDATE_ENGINE_MOCK_UPDATE_MANAGER_H
diff --git a/update_manager/update_manager.cc b/update_manager/update_manager.cc
index 5dfc09c..0069496 100644
--- a/update_manager/update_manager.cc
+++ b/update_manager/update_manager.cc
@@ -50,6 +50,13 @@
     ec->RemoveObserversAndTimeout();
 }
 
+void UpdateManager::AsyncPolicyRequestUpdateCheckAllowed(
+    base::Callback<void(EvalStatus, const UpdateCheckParams& result)> callback,
+    EvalStatus (Policy::*policy_method)(
+        EvaluationContext*, State*, std::string*, UpdateCheckParams*) const) {
+  AsyncPolicyRequest(callback, policy_method);
+}
+
 void UpdateManager::UnregisterEvalContext(EvaluationContext* ec) {
   if (!ec_repo_.erase(ec)) {
     LOG(ERROR) << "Unregistering an unknown evaluation context, this is a bug.";
diff --git a/update_manager/update_manager.h b/update_manager/update_manager.h
index b0fd97f..732175f 100644
--- a/update_manager/update_manager.h
+++ b/update_manager/update_manager.h
@@ -42,8 +42,27 @@
   }
 };
 
+// Please do not move this class into a new file for simplicity.
+// This pure virtual class is purely created for purpose of testing. The reason
+// was that |UpdateManager|'s member functions are templatized, which does not
+// play nicely when testing (mocking + faking). Whenever a specialized member of
+// |UpdateManager| must be tested, please add a specialized template member
+// function within this class for testing.
+class SpecializedPolicyRequestInterface {
+ public:
+  virtual ~SpecializedPolicyRequestInterface() = default;
+
+  virtual void AsyncPolicyRequestUpdateCheckAllowed(
+      base::Callback<void(EvalStatus, const UpdateCheckParams& result)>
+          callback,
+      EvalStatus (Policy::*policy_method)(EvaluationContext*,
+                                          State*,
+                                          std::string*,
+                                          UpdateCheckParams*) const) = 0;
+};
+
 // The main Update Manager singleton class.
-class UpdateManager {
+class UpdateManager : public SpecializedPolicyRequestInterface {
  public:
   // Creates the UpdateManager instance, assuming ownership on the provided
   // |state|.
@@ -91,6 +110,14 @@
           EvaluationContext*, State*, std::string*, R*, ExpectedArgs...) const,
       ActualArgs... args);
 
+  void AsyncPolicyRequestUpdateCheckAllowed(
+      base::Callback<void(EvalStatus, const UpdateCheckParams& result)>
+          callback,
+      EvalStatus (Policy::*policy_method)(EvaluationContext*,
+                                          State*,
+                                          std::string*,
+                                          UpdateCheckParams*) const) override;
+
  protected:
   // The UpdateManager receives ownership of the passed Policy instance.
   void set_policy(const Policy* policy) { policy_.reset(policy); }