diff --git a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
index c42036d1cd..5667d7de4d 100644
--- a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
+++ b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
@@ -22,17 +22,17 @@ namespace Volo.Abp.Localization.VirtualFiles
             _virtualPath = virtualPath;
         }
 
-        public void Initialize(LocalizationResourceInitializationContext context)
+        public virtual void Initialize(LocalizationResourceInitializationContext context)
         {
             _virtualFileProvider = context.ServiceProvider.GetRequiredService<IVirtualFileProvider>();
         }
 
-        public LocalizedString GetOrNull(string cultureName, string name)
+        public virtual LocalizedString GetOrNull(string cultureName, string name)
         {
             return GetDictionaries().GetOrDefault(cultureName)?.GetOrNull(name);
         }
 
-        public void Fill(string cultureName, Dictionary<string, LocalizedString> dictionary)
+        public virtual void Fill(string cultureName, Dictionary<string, LocalizedString> dictionary)
         {
             GetDictionaries().GetOrDefault(cultureName)?.Fill(dictionary);
         }
@@ -105,4 +105,4 @@ namespace Volo.Abp.Localization.VirtualFiles
 
         protected abstract ILocalizationDictionary CreateDictionaryFromFileContent(string fileContent);
     }
-}
\ No newline at end of file
+}