diff --git a/src/art/megatron/model_support/registry.py b/src/art/megatron/model_support/registry.py
index 87f88793e..7dc9c785f 100644
--- a/src/art/megatron/model_support/registry.py
+++ b/src/art/megatron/model_support/registry.py
@@ -171,6 +171,7 @@
     handler_key=_QWEN3_5_DENSE_HANDLER_KEY,
     model_names=(
         "Qwen/Qwen3.5-4B",
+        "Qwen/Qwen3.5-9B",
         "Qwen/Qwen3.5-27B",
         "Qwen/Qwen3.6-27B",
         "Qwen/Qwen3.8-27B",
diff --git a/tests/integration/megatron/model_support/test_provider_support.py b/tests/integration/megatron/model_support/test_provider_support.py
index c4067cec9..15b056335 100644
--- a/tests/integration/megatron/model_support/test_provider_support.py
+++ b/tests/integration/megatron/model_support/test_provider_support.py
@@ -147,6 +147,16 @@ def test_qwen38_27b_uses_qwen35_dense_support() -> None:
     assert handler.key == "qwen3_5_dense"
 
 
+def test_qwen35_9b_uses_qwen35_dense_support() -> None:
+    spec = get_model_support_spec("Qwen/Qwen3.5-9B")
+    handler = get_model_support_handler("Qwen/Qwen3.5-9B")
+
+    assert spec.key == "qwen3_5_dense"
+    assert spec.is_moe is False
+    assert spec.native_vllm_lora_status == "validated"
+    assert handler.key == "qwen3_5_dense"
+
+
 def test_glm53_bf16_uses_glm52_support() -> None:
     spec = get_model_support_spec("zai-org/GLM-5.3-BF16")
     handler = get_model_support_handler("zai-org/GLM-5.3-BF16")