diff --git a/test/unit_tests/image_stitcher_test.py b/test/unit_tests/image_stitcher_test.py
index 968b20c..e383b10 100644
--- a/test/unit_tests/image_stitcher_test.py
+++ b/test/unit_tests/image_stitcher_test.py
@@ -43,5 +43,5 @@ def base_patch_metadata(width, height, page_width, page_height):
 
 @pytest.fixture
 def patches_metadata(base_patch_metadata):
-    patches_metadata = BoxSplitter().split_box(base_patch_metadata)
+    patches_metadata = list(BoxSplitter().split_box(base_patch_metadata))
     return patches_metadata