diff --git a/tests/v1/spec_decode/test_acceptance_length.py b/tests/v1/spec_decode/test_acceptance_length.py
index 176716e9e..7276688f4 100644
--- a/tests/v1/spec_decode/test_acceptance_length.py
+++ b/tests/v1/spec_decode/test_acceptance_length.py
@@ -88,6 +88,8 @@ def get_available_attention_backends() -> list[str]:
     get_valid_backends = getattr(current_platform.__class__, "get_valid_backends", None)
     if get_valid_backends is None:
         if current_platform.is_rocm():
+            # ROCm uses Triton as its default attention backend since
+            # Flash Attention is not supported.
             return ["TRITON_ATTN"]
         else:
             return ["FLASH_ATTN"]