diff --git a/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_transformation.py b/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_transformation.py
index 92c012d339c..b3eec97058a 100644
--- a/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_transformation.py
+++ b/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_transformation.py
@@ -700,6 +700,14 @@ class TestBedrockMantlePricing:
         assert info["input_cost_per_token"] == pytest.approx(7e-8)
         assert info["output_cost_per_token"] == pytest.approx(3e-7)
 
+    def test_gpt_oss_safeguard_20b_pricing(self, monkeypatch):
+        monkeypatch.setenv("LITELLM_LOCAL_MODEL_COST_MAP", "true")
+        litellm.add_known_models()
+        info = litellm.get_model_info("bedrock_mantle/openai.gpt-oss-safeguard-20b")
+        # Bedrock pricing: $0.07/M input, $0.20/M output
+        assert info["input_cost_per_token"] == pytest.approx(7e-8)
+        assert info["output_cost_per_token"] == pytest.approx(2e-7)
+
     def test_pricing_significantly_cheaper_than_openai_native(self, monkeypatch):
         """
         Verify Bedrock Mantle pricing is cheaper than OpenAI's direct API pricing.