diff --git a/tests/kernels/utils.py b/tests/kernels/utils.py
index a2d414f636e13..c3d5252edc2a3 100644
--- a/tests/kernels/utils.py
+++ b/tests/kernels/utils.py
@@ -869,6 +869,7 @@ def make_test_metadata(
         return attn_backend.make_metadata(
             num_prefills=num_prefills,
             slot_mapping=(None if kv_mmap is None else kv_mmap.slot_mapping),
+            multi_modal_placeholder_index_maps=None,
             num_prefill_tokens=num_prefill_tokens,
             num_decode_tokens=num_decode_tokens,
             seq_lens=seq_lens,
@@ -914,6 +915,7 @@ def make_test_metadata(
         return attn_backend.make_metadata(
             num_prefills=num_prefills,
             slot_mapping=kv_mmap.slot_mapping,
+            multi_modal_placeholder_index_maps=None,
             num_prefill_tokens=num_prefill_tokens,
             num_decode_tokens=num_decode_tokens,
             seq_lens=seq_lens,