diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestClients.cs b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestClients.cs
index 6f856928..8ec5c2c9 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestClients.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestClients.cs
@@ -17,7 +17,7 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests
             });
         }
 
-        public static readonly Settings.ICertificateManager GlobalCertificateManager;
+        public static readonly Settings.CertificateManager GlobalCertificateManager;
 
         public static readonly WechatTenpayClient Instance;
     }