diff --git a/tests/common/test_utils_reconstitution.py b/tests/common/test_utils_reconstitution.py
index 9a8a26f..7c36237 100644
--- a/tests/common/test_utils_reconstitution.py
+++ b/tests/common/test_utils_reconstitution.py
@@ -25,7 +25,7 @@ def test_synthesize_page():
 
     # Test with polygons
     pages_poly = pages[0].export()
-    pages_poly["blocks"][0]["lines"][1]["geometry"] = [(0, 0), (0, 1), (1, 1), (1, 0)]
+    pages_poly["blocks"][0]["lines"][0]["geometry"] = [(0, 0), (0, 1), (1, 1), (1, 0)]
     render_poly = reconstitution.synthesize_page(pages_poly, draw_proba=True)
     assert isinstance(render_poly, np.ndarray)
     assert render_poly.shape == (*pages[0].dimensions, 3)