diff --git a/code/controllers/subsystem/SSchat.dm b/code/controllers/subsystem/SSchat.dm
index 3c184030c49..f76d4467d0d 100644
--- a/code/controllers/subsystem/SSchat.dm
+++ b/code/controllers/subsystem/SSchat.dm
@@ -71,6 +71,11 @@ SUBSYSTEM_DEF(chat)
 /datum/controller/subsystem/chat/proc/send_immediate(send_target, list/message_data)
 	var/list/targets = islist(send_target) ? send_target : list(send_target)
 	for(var/target in targets)
+#ifdef GAME_TESTS
+		var/mob/M = target
+		if(istype(M) && M?:mind?:key == "interaction_test_[M.UID()]")
+			LAZYADD(GLOB.game_test_chats[M.mind.key], message_to_html(message_data))
+#endif
 		var/client/client = CLIENT_FROM_VAR(target)
 		if(isnull(client))
 			continue
diff --git a/code/tests/_game_test.dm b/code/tests/_game_test.dm
index 3781987af15..32c2c3bc661 100644
--- a/code/tests/_game_test.dm
+++ b/code/tests/_game_test.dm
@@ -1,3 +1,5 @@
+GLOBAL_LIST_EMPTY(game_test_chats)
+
 /// For advanced cases, fail unconditionally but don't return (so a test can return multiple results)
 #define TEST_FAIL(reason) (Fail(reason || "No reason", __FILE__, __LINE__))
 
diff --git a/code/tests/_game_test_puppeteer.dm b/code/tests/_game_test_puppeteer.dm
index e9f560fe86a..2eb85778e28 100644
--- a/code/tests/_game_test_puppeteer.dm
+++ b/code/tests/_game_test_puppeteer.dm
@@ -66,3 +66,10 @@
 
 /datum/test_puppeteer/proc/rejuvenate()
 	puppet.rejuvenate()
+
+/datum/test_puppeteer/proc/last_chatlog_has_text(snippet)
+	if(!(puppet.mind.key in GLOB.game_test_chats))
+		return FALSE
+	var/list/puppet_chat_list = GLOB.game_test_chats[puppet.mind.key]
+	var/last_chat_html = puppet_chat_list[length(puppet_chat_list)]
+	return findtextEx(last_chat_html, snippet)
diff --git a/code/tests/attack_chain/test_attack_chain_vehicles.dm b/code/tests/attack_chain/test_attack_chain_vehicles.dm
index 791b45497ba..6b2588bc2be 100644
--- a/code/tests/attack_chain/test_attack_chain_vehicles.dm
+++ b/code/tests/attack_chain/test_attack_chain_vehicles.dm
@@ -6,10 +6,9 @@
 	player.click_on(janicart)
 	TEST_ASSERT_EQUAL(janicart.inserted_key, janicart_key, "did not find janicart key in vehicle")
 
-	var/move_delay = janicart.vehicle_move_delay
 	player.spawn_obj_in_hand(/obj/item/borg/upgrade/vtec)
 	player.click_on(janicart)
-	TEST_ASSERT(janicart.vehicle_move_delay < move_delay, "VTEC upgrade not applied properly")
+	TEST_ASSERT(player.last_chatlog_has_text("You upgrade the janicart"), "VTEC upgrade not applied properly")
 
 	TEST_ASSERT_NULL(janicart.mybag, "unexpected trash bag on janicart")
 	var/obj/item/storage/bag/trash/bag = player.spawn_obj_in_hand(/obj/item/storage/bag/trash)