diff --git a/llm_server/cluster/backend.py b/llm_server/cluster/backend.py
index 2a7edc3..62dc2c5 100644
--- a/llm_server/cluster/backend.py
+++ b/llm_server/cluster/backend.py
@@ -6,6 +6,7 @@ from llm_server.cluster.stores import redis_running_models
 from llm_server.custom_redis import redis
 from llm_server.llm.generator import generator
 from llm_server.llm.info import get_info
+from llm_server.llm.vllm.vllm_backend import VLLMBackend
 from llm_server.routes.queue import priority_queue
 from llm_server.routes.stats import calculate_wait_time, get_active_gen_workers_model
 
@@ -33,11 +34,15 @@ def is_valid_model(model_name: str):
 def test_backend(backend_url: str, test_prompt: bool = False):
     backend_info = cluster_config.get_backend(backend_url)
     if test_prompt:
-        data = {
-            "prompt": "Test prompt",
+        handler = VLLMBackend(backend_url)
+        parameters, _ = handler.get_parameters({
             "stream": False,
             "temperature": 0,
             "max_new_tokens": 3,
+        })
+        data = {
+            'prompt': 'test prompt',
+            **parameters
         }
         try:
             success, response, err = generator(data, backend_url, timeout=10)
diff --git a/llm_server/workers/inferencer.py b/llm_server/workers/inferencer.py
index a1dd749..0738c1b 100644
--- a/llm_server/workers/inferencer.py
+++ b/llm_server/workers/inferencer.py
@@ -66,7 +66,6 @@ def inference_do_stream(stream_name: str, msg_to_backend: dict, backend_url: str
                             json_obj = json.loads(json_str.decode())
                             new = json_obj['text'][0].split(prompt + generated_text)[1]
                             generated_text = generated_text + new
-                            print(new)
                         except IndexError:
                             # ????
                             continue