diff --git a/.luacheckrc b/.luacheckrc
index 655b9fe..936b5e1 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -45,7 +45,7 @@ read_globals = {
 		fields = {"copy"},
 	},
 	mtt = {
-		fields = {"join_player", "register"},
+		fields = {"join_player", "leave_player", "register"},
 	}
 }
 
diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml
index d374124..3c39a14 100644
--- a/.woodpecker/test.yml
+++ b/.woodpecker/test.yml
@@ -1,3 +1,5 @@
+when:
+  - event: push
 steps:
   luacheck:
     image: pipelinecomponents/luacheck
@@ -10,6 +12,7 @@ steps:
       - apk add git
       - mkdir test/worldmods
       - git clone --depth 1 https://github.com/BuckarooBanzay/mtt test/worldmods/mtt
+      - git clone --depth 1 https://github.com/OgelGames/fakelib test/worldmods/fakelib
       - git clone --depth 1 https://codeberg.org/Wuzzy/minetest_doc test/worldmods/doc
       - git clone --depth 1 https://git.bananach.space/advtrains.git test/worldmods/advtrains
       - git clone --depth 1 https://git.bananach.space/basic_trains.git test/worldmods/basic_trains
diff --git a/mod.conf b/mod.conf
index aeef199..0c9e39b 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,5 +1,5 @@
 name=advtrains_doc_integration
 title=Documentation system integration for Advtrains
 depends=advtrains,doc
-optional_depends=advtrains_attachment_offset_patch,advtrains_livery_database,dlxtrains,doc_items,mtt,multi_component_liveries,techage
+optional_depends=advtrains_attachment_offset_patch,advtrains_livery_database,dlxtrains,doc_items,fakelib,mtt,multi_component_liveries,techage
 supported_games=*,minetest_game
diff --git a/mtt.lua b/mtt.lua
index 035a7de..59717ed 100644
--- a/mtt.lua
+++ b/mtt.lua
@@ -1,11 +1,11 @@
 if doc then
 	mtt.register("wagon information formspec", function(cb)
-		local player = mtt.join_player("singleplayer")
+		mtt.join_player("singleplayer")
 		for k in pairs(advtrains_doc_integration.prototypes) do
 			print("Found wagon prototype: " .. k)
 			doc.show_entry("singleplayer", "advtrains_wagons", k, true)
 		end
-		player:leave()
+		mtt.leave_player("singleplayer")
 		cb()
 	end)
 end