diff --git a/tests/test_c_extension.py b/tests/test_c_extension.py
index 51674a8..79afe59 100644
--- a/tests/test_c_extension.py
+++ b/tests/test_c_extension.py
@@ -52,10 +52,13 @@ def test_c_extension():
         Point2((29.5, 34.5))
     ]
 
+    influenced_grid[5:8, 5:8] = np.inf
+    influenced_grid[28:31, 33:36] = np.inf
+
     paths_nydus = astar_path_with_nyduses(influenced_grid, (3, 3), (33, 38), nydus_positions, False, False)
 
     assert (paths_nydus is not None and len(paths_nydus) == 2
-            and len(paths_nydus[0]) + len(paths_nydus[1]) == 8)
+            and len(paths_nydus[0]) + len(paths_nydus[1]) == 7)
 
     height_map = np.where(walkable_grid == 0, 24, 8).astype(np.uint8)