diff --git a/TOOLS/lua/test-hooks.lua b/TOOLS/lua/test-hooks.lua
index 4e84d9e465..d91c3731bb 100644
--- a/TOOLS/lua/test-hooks.lua
+++ b/TOOLS/lua/test-hooks.lua
@@ -25,8 +25,8 @@ end
 
 local props = {"path", "metadata"}
 for _, name in ipairs(props) do
-    mp.observe_property(name, "native", function(name, val)
-        print("property '" .. name .. "' changed to '" ..
+    mp.observe_property(name, "native", function(prop, val)
+        print("property '" .. prop .. "' changed to '" ..
               utils.to_string(val) .. "'")
     end)
 end