diff --git a/squirrelbattle/tests/game_test.py b/squirrelbattle/tests/game_test.py
index 9c14d40..4a57ba0 100644
--- a/squirrelbattle/tests/game_test.py
+++ b/squirrelbattle/tests/game_test.py
@@ -7,7 +7,7 @@ import unittest
 from ..bootstrap import Bootstrap
 from ..display.display import Display
 from ..display.display_manager import DisplayManager
-from ..entities.friendly import Sunflower
+from ..entities.friendly import Sunflower, Merchant
 from ..entities.items import Bomb
 from ..entities.player import Player
 from ..enums import DisplayActions
@@ -35,7 +35,14 @@ class TestGame(unittest.TestCase):
         """
         bomb = Bomb()
         self.game.map.add_entity(bomb)
+        # Add an item in the inventory to check that it is well loaded
         bomb.hold(self.game.player)
+
+        # Ensure that merchants can be saved
+        merchant = Merchant()
+        merchant.move(3, 6)
+        self.game.map.add_entity(merchant)
+
         old_state = self.game.save_state()
 
         self.game.handle_key_pressed(KeyValues.DOWN)