diff --git a/common/mock_prefs.h b/common/mock_prefs.h
index f308074..028650d 100644
--- a/common/mock_prefs.h
+++ b/common/mock_prefs.h
@@ -47,6 +47,9 @@
 
   MOCK_METHOD2(AddObserver, void(std::string_view key, ObserverInterface*));
   MOCK_METHOD2(RemoveObserver, void(std::string_view key, ObserverInterface*));
+  MOCK_METHOD(bool, StartTransaction, (), (override));
+  MOCK_METHOD(bool, CancelTransaction, (), (override));
+  MOCK_METHOD(bool, SubmitTransaction, (), (override));
 };
 
 }  // namespace chromeos_update_engine