no empty passwords ... (#17137)

* no empty passwords ...

* .

* Update world.dm

* defines

* .

code/modules/asset_cache/iconforge/universal_icon.dm

@@ -11,7 +11,7 @@
 
 /// Don't instantiate these yourself, use uni_icon.
 /datum/universal_icon/New(icon/icon_file, icon_state="", dir=SOUTH, frame=1, datum/icon_transformer/transform=null, color=null)
-	#ifdef UNIT_TESTS
+	#ifdef UNIT_TEST
 	// This check is kinda slow and shouldn't fail unless a developer makes a mistake. So it'll get caught in unit tests.
 	if(!isicon(icon_file) || !isfile(icon_file) || "[icon_file]" == "/icon")
 		// bad! use 'icons/path_to_dmi.dmi' format only

code/modules/asset_cache/transports/asset_transport.dm

@@ -85,7 +85,7 @@
 /// asset_list - A list of asset filenames to be sent to the client. Can optionally be assoicated with the asset's asset_cache_item datum.
 /// Returns TRUE if any assets were sent.
 /datum/asset_transport/proc/send_assets(client/client, list/asset_list)
-#if defined(UNIT_TESTS)
+#if defined(UNIT_TEST)
 	return
 #endif
 	if (!istype(client))