diff --git a/TOOLS/lua/audio-hotplug-test.lua b/TOOLS/lua/audio-hotplug-test.lua
index 8dedc68cbe..e0ef223c0c 100644
--- a/TOOLS/lua/audio-hotplug-test.lua
+++ b/TOOLS/lua/audio-hotplug-test.lua
@@ -1,8 +1,6 @@
-local utils = require("mp.utils")
-
-mp.observe_property("audio-device-list", "native", function(name, val)
+mp.observe_property("audio-device-list", "native", function(_, val)
     print("Audio device list changed:")
-    for index, e in ipairs(val) do
+    for _, e in ipairs(val) do
         print("  - '" .. e.name .. "' (" .. e.description .. ")")
     end
 end)