diff --git a/project.godot b/project.godot
index 77df0d8..c6c3da7 100644
--- a/project.godot
+++ b/project.godot
@@ -21,7 +21,7 @@ _global_script_class_icons={
 [application]
 
 config/name="godot-util"
-run/main_scene="res://scene/demo01_hello/HelloWorld.tscn"
+run/main_scene="res://scene/demo01_hello/hello_world.tscn"
 config/icon="res://icon.png"
 
 [input]
diff --git a/scene/demo01_hello/HelloWorld.tscn b/scene/demo01_hello/hello_world.tscn
similarity index 100%
rename from scene/demo01_hello/HelloWorld.tscn
rename to scene/demo01_hello/hello_world.tscn
diff --git a/scene/demo03_lifecycle/LifeCycle.tscn b/scene/demo03_lifecycle/life_cycle.tscn
similarity index 100%
rename from scene/demo03_lifecycle/LifeCycle.tscn
rename to scene/demo03_lifecycle/life_cycle.tscn
diff --git a/scene/demo05_scene_node/SceneNode.tscn b/scene/demo05_scene_node/scene_node.tscn
similarity index 100%
rename from scene/demo05_scene_node/SceneNode.tscn
rename to scene/demo05_scene_node/scene_node.tscn
diff --git a/scene/demo_test/DemoTest.tscn b/scene/demo_test/demo_test.tscn
similarity index 100%
rename from scene/demo_test/DemoTest.tscn
rename to scene/demo_test/demo_test.tscn
diff --git a/zfoo/test/ZfooTest.tscn b/zfoo/test/zfoo_test.tscn
similarity index 100%
rename from zfoo/test/ZfooTest.tscn
rename to zfoo/test/zfoo_test.tscn