diff --git a/tests/llm_translation/test_bedrock_gpt_oss.py b/tests/llm_translation/test_bedrock_gpt_oss.py
index 61bce04e2d0..9487abfbc77 100644
--- a/tests/llm_translation/test_bedrock_gpt_oss.py
+++ b/tests/llm_translation/test_bedrock_gpt_oss.py
@@ -2,11 +2,13 @@ from base_llm_unit_tests import BaseLLMChatTest
 import pytest
 import sys
 import os
+from unittest.mock import patch, MagicMock
 
 sys.path.insert(
     0, os.path.abspath("../..")
 )  # Adds the parent directory to the system path
 import litellm
+from litellm.llms.bedrock.chat.converse_transformation import AmazonConverseConfig
 
 
 class TestBedrockGPTOSS(BaseLLMChatTest):
@@ -25,3 +27,27 @@ class TestBedrockGPTOSS(BaseLLMChatTest):
         Remove override once we have access to Bedrock prompt caching
         """
         pass
+
+    @pytest.mark.parametrize("model", [
+        "bedrock/openai.gpt-oss-20b-1:0",
+        "bedrock/openai.gpt-oss-120b-1:0",
+    ])
+    def test_reasoning_effort_transformation_gpt_oss(self, model):
+        """Test that reasoning_effort is handled correctly for GPT-OSS models."""
+        config = AmazonConverseConfig()
+
+        # Test GPT-OSS model - should keep reasoning_effort as-is
+        non_default_params = {"reasoning_effort": "low"}
+        optional_params = {}
+
+        result = config.map_openai_params(
+            non_default_params=non_default_params,
+            optional_params=optional_params,
+            model=model,
+            drop_params=False,
+        )
+        
+        # GPT-OSS should have reasoning_effort in result, not thinking
+        assert "reasoning_effort" in result
+        assert result["reasoning_effort"] == "low"
+        assert "thinking" not in result