diff --git a/scenario_execution.py b/scenario_execution.py
index 844afe1..24ef7e9 100644
--- a/scenario_execution.py
+++ b/scenario_execution.py
@@ -77,13 +77,16 @@ def run_test_suite(tasks):
         print(f"--- Starting Task: {task['id']} ---")
         
         # Use Popen to stream output in real-time
+        env = os.environ.copy()
+        env["PYTHONUNBUFFERED"] = "1"
         process = subprocess.Popen(
             [shell_script, task['id'], task['cmd'], task['path'], REPO_PATH],
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
             text=True,
             bufsize=1,
-            universal_newlines=True
+            universal_newlines=True,
+            env=env
         )
 
         full_output = ""
diff --git a/test_execution.sh b/test_execution.sh
index a3710bc..d8f1a73 100644
--- a/test_execution.sh
+++ b/test_execution.sh
@@ -38,8 +38,9 @@ EOF
 # 1. CD into the repo path
 # 2. Execute command and capture output
 # 3. PIPESTATUS[0] captures the exit code of the eval "$CMD"
+export PYTHONUNBUFFERED=1
 echo "--- Execution Start ---" | tee -a >(sed 's/$/<br>/' >> "$LOG_FILE")
-cd "$REPO_PATH" && eval "$CMD" 2>&1 | tee -a >(sed 's/$/<br>/' >> "$LOG_FILE")
+cd "$REPO_PATH" && stdbuf -oL -eL eval "$CMD" 2>&1 | tee -a >(sed 's/$/<br>/' >> "$LOG_FILE")
 EXIT_CODE=${PIPESTATUS[0]}
 echo "--- Execution End (Exit Code: $EXIT_CODE) ---" | tee -a >(sed 's/$/<br>/' >> "$LOG_FILE")
 
diff --git a/testarena_app/worker.py b/testarena_app/worker.py
index db71f5c..f2e6996 100644
--- a/testarena_app/worker.py
+++ b/testarena_app/worker.py
@@ -139,9 +139,12 @@ def run_worker():
                 checkout_cmd = f"./TPF/gitea_repo_controller.sh checkout {queue.source}"
                 run_command_with_logging(checkout_cmd, queue_log)
                 
+                # Clean up any orphaned QEMU processes
+                run_command_with_logging("pkill -f qemu-system-xtensa || true", queue_log)
+
                 # 1-5 Build software and run QEMU
                 # We stop when we see the multicore app start message
-                build_cmd = f"/bin/bash -c 'source $HOME/esp/esp-idf/export.sh && cd TPF/Sensor_hub_repo && idf.py build && idf.py qemu'"
+                build_cmd = f"/bin/bash -c 'export PYTHONUNBUFFERED=1 && source $HOME/esp/esp-idf/export.sh && cd TPF/Sensor_hub_repo && idf.py build && idf.py qemu'"
                 run_command_with_logging(build_cmd, queue_log, stop_string="cpu_start: Multicore app")
                 
                 # 9- Loop for each task
@@ -162,7 +165,7 @@ def run_worker():
                         # It must be executed from TPF/Sensor_hub_repo with IDF sourced
                         script_path = os.path.abspath("./TPF/scenario_execution.py")
                         repo_dir = os.path.abspath("./TPF/Sensor_hub_repo")
-                        cmd = f"/bin/bash -c 'source $HOME/esp/esp-idf/export.sh && python3 {script_path} {queue.id} {task.scenario_path} {task.id}'"
+                        cmd = f"/bin/bash -c 'export PYTHONUNBUFFERED=1 && source $HOME/esp/esp-idf/export.sh && python3 {script_path} {queue.id} {task.scenario_path} {task.id}'"
                         
                         task_dir = os.path.join(queue_dir, task.id)
                         os.makedirs(task_dir, exist_ok=True)