diff --git a/sonic-radiance.love/scenes/test_scene/init.lua b/sonic-radiance.love/scenes/test_scene/init.lua
index 3ca7f8f..df6c555 100644
--- a/sonic-radiance.love/scenes/test_scene/init.lua
+++ b/sonic-radiance.love/scenes/test_scene/init.lua
@@ -39,7 +39,9 @@ function MovePlayer:new(playerNumber, cameraMode)
   self.world.cameras:setMode(cameraMode)
 
   self.world:loadMap()
-  self.world.obj.collisions["wall"](self.world, 0,0,-16,1000, 1000, 16)
+
+  local w, h = self.world:getDimensions()
+  self.world.obj.collisions["wall"](self.world,   0,   0, -16,  w,  h, 16)
 end
 
 return MovePlayer