diff --git a/v2rayN/v2rayN/Forms/MainForm.cs b/v2rayN/v2rayN/Forms/MainForm.cs
index 13eb5859..d5fb21e5 100644
--- a/v2rayN/v2rayN/Forms/MainForm.cs
+++ b/v2rayN/v2rayN/Forms/MainForm.cs
@@ -652,7 +652,7 @@ namespace v2rayN.Forms
         }
         private void Speedtest(string actionType)
         {
-            GetLvSelectedIndex();
+            if (GetLvSelectedIndex() < 0) return;
             ClearTestResult();
             SpeedtestHandler statistics = new SpeedtestHandler(ref config, ref v2rayHandler, lvSelecteds, actionType, UpdateSpeedtestHandler);
         }