diff --git a/src/promptflow/promptflow/executor/_line_execution_process_pool.py b/src/promptflow/promptflow/executor/_line_execution_process_pool.py
index 620c9e865988..3be9c8e24212 100644
--- a/src/promptflow/promptflow/executor/_line_execution_process_pool.py
+++ b/src/promptflow/promptflow/executor/_line_execution_process_pool.py
@@ -426,7 +426,7 @@ def _log_set_worker_count(self, worker_count, estimated_available_worker_count):
             f"Set process count to {worker_count} with the environment variable 'PF_WORKER_COUNT'.")
         if estimated_available_worker_count is not None and estimated_available_worker_count < worker_count:
             bulk_logger.warning(
-                f"The current process count({worker_count}) is larger than recommended process count"
+                f"The current process count ({worker_count}) is larger than recommended process count "
                 f"({estimated_available_worker_count}) that estimated by system available memory. This may "
                 f"cause memory exhaustion")
 
diff --git a/src/promptflow/tests/executor/unittests/processpool/test_line_execution_process_pool.py b/src/promptflow/tests/executor/unittests/processpool/test_line_execution_process_pool.py
index 185446d1f636..3230b32e7dfa 100644
--- a/src/promptflow/tests/executor/unittests/processpool/test_line_execution_process_pool.py
+++ b/src/promptflow/tests/executor/unittests/processpool/test_line_execution_process_pool.py
@@ -132,7 +132,7 @@ def test_spawn_mode_parallelism_in_subprocess(
                             f"Set process count to {pf_worker_count} with the environment "
                             f"variable 'PF_WORKER_COUNT'.")
                         mock_logger.warning.assert_any_call(
-                            f"The current process count({pf_worker_count}) is larger than recommended process count"
+                            f"The current process count ({pf_worker_count}) is larger than recommended process count "
                             f"({estimated_available_worker_count}) that estimated by system available memory. This may "
                             f"cause memory exhaustion")
                     elif is_set_environ_pf_worker_count and not is_calculation_smaller_than_set: