diff --git a/Editor/ToolsWindowBase.cs b/Editor/ToolsWindowBase.cs
index ae14fb2..6248f15 100644
--- a/Editor/ToolsWindowBase.cs
+++ b/Editor/ToolsWindowBase.cs
@@ -10,6 +10,8 @@ namespace NegUtils.Editor
     [InitializeOnLoad]
     public class ToolsWindowBase : EditorWindow
     {
+        private const int UnitySceneExtensionLength = 6;
+        
         static ToolsWindowBase()
         {
             EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
@@ -69,7 +71,7 @@ namespace NegUtils.Editor
             for (int i = 0; i < fileInfo.Length; i++)
             {
                 string s = fileInfo[i];
-                menu.AddItem(new GUIContent(s.Remove(0, basePath.Length + 1).Remove(s.Length - basePath.Length - 7 ,6).Replace('\\', '/')), false, () => {
+                menu.AddItem(new GUIContent(s.Remove(0, basePath.Length + 1).Remove(s.Length - basePath.Length - UnitySceneExtensionLength - 1 ,UnitySceneExtensionLength).Replace('\\', '/')), false, () => {
                     LoadScene(s);
                 });