diff --git a/tests/test_litellm/llms/watsonx/test_watsonx.py b/tests/test_litellm/llms/watsonx/test_watsonx.py
index 8779152e962..f325af6b36f 100644
--- a/tests/test_litellm/llms/watsonx/test_watsonx.py
+++ b/tests/test_litellm/llms/watsonx/test_watsonx.py
@@ -283,10 +283,19 @@ async def test_watsonx_gpt_oss_prompt_transformation(monkeypatch):
         # Return failure to use tokenizer_config instead
         return {"status": "failure"}
 
-    # Clear any cached tokenizer config for this model to ensure fresh fetch
+    # Set cached tokenizer config directly to avoid race conditions with parallel tests.
+    # When running with pytest-xdist (-n 16), another test might populate the cache between
+    # clearing it and the actual usage. By setting the cache directly, we ensure the correct
+    # template is always used regardless of test execution order.
     hf_model = "openai/gpt-oss-120b"
-    if hf_model in litellm.known_tokenizer_config:
-        del litellm.known_tokenizer_config[hf_model]
+    litellm.known_tokenizer_config[hf_model] = mock_tokenizer_config
+    
+    # Also create sync mock functions in case the fallback sync path is used
+    def mock_get_tokenizer_config(hf_model_name: str):
+        return mock_tokenizer_config
+
+    def mock_get_chat_template_file(hf_model_name: str):
+        return {"status": "failure"}
     
     with patch.object(client, "post") as mock_post, patch.object(
         litellm.module_level_client, "post", return_value=mock_token_response
@@ -296,6 +305,12 @@ async def test_watsonx_gpt_oss_prompt_transformation(monkeypatch):
     ), patch(
         "litellm.litellm_core_utils.prompt_templates.huggingface_template_handler._aget_chat_template_file",
         side_effect=mock_aget_chat_template_file,
+    ), patch(
+        "litellm.litellm_core_utils.prompt_templates.huggingface_template_handler._get_tokenizer_config",
+        side_effect=mock_get_tokenizer_config,
+    ), patch(
+        "litellm.litellm_core_utils.prompt_templates.huggingface_template_handler._get_chat_template_file",
+        side_effect=mock_get_chat_template_file,
     ):
         # Set the mock to return the completion response
         mock_post.return_value = mock_completion_response