diff --git a/tests/unit/algo/instance_segmentation/heads/test_custom_rtmdet_ins_head.py b/tests/unit/algo/instance_segmentation/heads/test_custom_rtmdet_ins_head.py
index 2ff04967585..77066e88584 100644
--- a/tests/unit/algo/instance_segmentation/heads/test_custom_rtmdet_ins_head.py
+++ b/tests/unit/algo/instance_segmentation/heads/test_custom_rtmdet_ins_head.py
@@ -71,7 +71,7 @@ def test_mask_pred(self, mocker) -> None:
         mask_head._bbox_mask_post_process(
             results[0],
             mask_feat,
-            cfg=None,
+            cfg=test_cfg,
         )
 
     def test_predict_by_feat_ov(self) -> None: