diff --git a/tests/test_models/test_segmentors/test_cylinder3d.py b/tests/test_models/test_segmentors/test_cylinder3d.py
index d036637e1..084918f54 100644
--- a/tests/test_models/test_segmentors/test_cylinder3d.py
+++ b/tests/test_models/test_segmentors/test_cylinder3d.py
@@ -17,7 +17,7 @@ def test_cylinder3d(self):
         DefaultScope.get_instance('test_cylinder3d', scope_name='mmdet3d')
         setup_seed(0)
         cylinder3d_cfg = get_detector_cfg(
-            'cylinder3d/cylinder3d_4xb2_3x_semantickitti.py')
+            'cylinder3d/cylinder3d_4xb4_3x_semantickitti.py')
         cylinder3d_cfg.decode_head['ignore_index'] = 1
         model = MODELS.build(cylinder3d_cfg)
         num_gt_instance = 3