diff --git a/evals/benchmark/benchmark.py b/evals/benchmark/benchmark.py
index 45121234..6e5419aa 100644
--- a/evals/benchmark/benchmark.py
+++ b/evals/benchmark/benchmark.py
@@ -46,7 +46,9 @@ def extract_test_case_data(content):
         "test_output_dir": test_suite_config.get("test_output_dir"),
         "run_time": test_suite_config.get("run_time"),
         "collect_service_metric": test_suite_config.get("collect_service_metric"),
-        "all_case_data": {example: content["test_cases"].get(example, {}) for example in test_suite_config.get("examples", [])}
+        "all_case_data": {
+            example: content["test_cases"].get(example, {}) for example in test_suite_config.get("examples", [])
+        },
     }
 
 
@@ -70,6 +72,7 @@ def create_run_yaml_content(service_name, base_url, bench_target, concurrency, u
         }
     }
 
+
 def create_and_save_run_yaml(example, service_type, service_name, base_url, test_suite_config, index):
     """Create and save the run.yaml file for the service being tested."""
     os.makedirs(test_suite_config["test_output_dir"], exist_ok=True)
@@ -78,10 +81,16 @@ def create_and_save_run_yaml(example, service_type, service_name, base_url, test
     for user_queries in test_suite_config["user_queries"]:
         concurrency = max(1, user_queries // test_suite_config["concurrent_level"])
 
-        bench_target = f"{example}{'bench' if service_type == 'e2e' and test_suite_config['random_prompt'] else 'fixed'}"
-        run_yaml_content = create_run_yaml_content(service_name, base_url, bench_target, concurrency, user_queries, test_suite_config)
+        bench_target = (
+            f"{example}{'bench' if service_type == 'e2e' and test_suite_config['random_prompt'] else 'fixed'}"
+        )
+        run_yaml_content = create_run_yaml_content(
+            service_name, base_url, bench_target, concurrency, user_queries, test_suite_config
+        )
 
-        run_yaml_path = os.path.join(test_suite_config["test_output_dir"], f"run_{service_name}_{index}_users_{user_queries}.yaml")
+        run_yaml_path = os.path.join(
+            test_suite_config["test_output_dir"], f"run_{service_name}_{index}_users_{user_queries}.yaml"
+        )
         with open(run_yaml_path, "w") as yaml_file:
             yaml.dump(run_yaml_content, yaml_file)
 
@@ -101,7 +110,9 @@ def run_service_test(example, service_type, service_name, parameters, test_suite
     timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
 
     # Create the run.yaml for the service
-    run_yaml_paths = create_and_save_run_yaml(example, service_type, service_name, base_url, test_suite_config, timestamp)
+    run_yaml_paths = create_and_save_run_yaml(
+        example, service_type, service_name, base_url, test_suite_config, timestamp
+    )
 
     # Run the test using locust_runtests function
     for index, run_yaml_path in enumerate(run_yaml_paths, start=1):
@@ -115,7 +126,9 @@ def process_service(example, service_name, case_data, test_suite_config):
     service = case_data.get(service_name)
     if service and service.get("run_test"):
         print(f"[OPEA BENCHMARK] 🚀 Example: {example} Service: {service.get('service_name')}, Running test...")
-        run_service_test(example, service_name, service.get("service_name"), service.get("parameters", {}), test_suite_config)
+        run_service_test(
+            example, service_name, service.get("service_name"), service.get("parameters", {}), test_suite_config
+        )
 
 
 if __name__ == "__main__":
@@ -132,7 +145,6 @@ def process_service(example, service_name, case_data, test_suite_config):
         "test_output_dir": parsed_data["test_output_dir"],
     }
 
-
     # Mapping of example names to service types
     example_service_map = {
         "chatqna": [