diff --git a/code/datums/greyscale/_greyscale_config.dm b/code/datums/greyscale/_greyscale_config.dm
index caf27af0139..b602305600d 100644
--- a/code/datums/greyscale/_greyscale_config.dm
+++ b/code/datums/greyscale/_greyscale_config.dm
@@ -151,7 +151,7 @@
 		generated_icon.GetPixel(1, 1)
 		generated_icons[icon_state] = generated_icon
 
-	var/icon/icon_bundle = icon('icons/Testing/greyscale_error.dmi')
+	var/icon/icon_bundle = icon('icons/testing/greyscale_error.dmi')
 	for(var/icon_state in generated_icons)
 		icon_bundle.Insert(generated_icons[icon_state], icon_state)
 
diff --git a/icons/Testing/greyscale_error.dmi b/icons/testing/greyscale_error.dmi
similarity index 100%
rename from icons/Testing/greyscale_error.dmi
rename to icons/testing/greyscale_error.dmi