diff --git a/test/base/TestFill.py b/test/base/TestFill.py
index 152bd8c3..d231fa15 100644
--- a/test/base/TestFill.py
+++ b/test/base/TestFill.py
@@ -30,7 +30,9 @@ def generate_locations(count: int, player_id: int, address: int = None, region:
     locations = []
     for i in range(count):
         name = "player" + str(player_id) + "_location" + str(i)
-        locations.append(Location(player_id, name, address, region))
+        location = Location(player_id, name, address, region)
+        locations.append(location)
+        region.locations.append(location)
     return locations
 
 
@@ -103,4 +105,4 @@ class TestBase(unittest.TestCase):
         fill_restrictive(multi_world, multi_world.state, locations, items)
 
         self.assertEqual(loc0.item, item1)
-        self.assertEqual(loc1.item, item0)
+        self.assertEqual(loc1.item, item0)
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