diff --git a/tests/models/quantization/test_bitsandbytes.py b/tests/models/quantization/test_bitsandbytes.py
index 24220978534c..808ffd89f47f 100644
--- a/tests/models/quantization/test_bitsandbytes.py
+++ b/tests/models/quantization/test_bitsandbytes.py
@@ -10,13 +10,14 @@
 
 from tests.quantization.utils import is_quant_method_supported
 from vllm.platforms import current_platform
+from vllm.platforms.rocm import on_gfx9
 
 from ...utils import compare_two_settings, multi_gpu_test
 from ..utils import check_embeddings_close, check_logprobs_close
 
 pytestmark = pytest.mark.skipif(
-    current_platform.is_rocm(),
-    reason="bitsandbytes quantization not supported on ROCm (CUDA-only kernels)",
+    current_platform.is_rocm() and on_gfx9(),
+    reason="bitsandbytes quantization not supported on Instinct (warp size 64 limitation)",
 )
 
 models_4bit_to_test = [
diff --git a/vllm/platforms/rocm.py b/vllm/platforms/rocm.py
index 1abd6300036d..376e61451d00 100644
--- a/vllm/platforms/rocm.py
+++ b/vllm/platforms/rocm.py
@@ -200,6 +200,9 @@ class RocmPlatform(Platform):
         "petit_nvfp4",
         "torchao",
     ]
+    # bitsandbytes quantization not supported on Instinct (warp size 64 limitation)
+    if not on_gfx9():
+        supported_quantization += ["bitsandbytes"]
 
     @classmethod
     def get_vit_attn_backend(cls, head_size: int, dtype: torch.dtype) -> "_Backend":