diff --git a/app/utils/test_to_thread.py b/app/utils/test_to_thread.py
index aeb2b54..7f68d67 100644
--- a/app/utils/test_to_thread.py
+++ b/app/utils/test_to_thread.py
@@ -5,10 +5,10 @@ import time
 async def main():
   common_counter = 0
 
-  def sync_delay(name: str):
+  async def async_delay(name: str):
     nonlocal common_counter
     # current_counter = common_counter
-    time.sleep(0.5)
+    await asyncio.sleep(0.5)
     print(f"{name},111\n")
     print(f"{name},222\n")
     common_counter = common_counter + 1
@@ -22,10 +22,16 @@ async def main():
   # sync_delay("2")
   # sync_delay("3")
 
+  # await asyncio.gather(
+  #   asyncio.create_task(asyncio.to_thread(sync_delay, name="A")),
+  #   asyncio.create_task(asyncio.to_thread(sync_delay, name="B")),
+  #   asyncio.create_task(asyncio.to_thread(sync_delay, name="C")),
+  # )
+
   await asyncio.gather(
-    asyncio.create_task(asyncio.to_thread(sync_delay, name="A")),
-    asyncio.create_task(asyncio.to_thread(sync_delay, name="B")),
-    asyncio.create_task(asyncio.to_thread(sync_delay, name="C")),
+    asyncio.create_task(async_delay(name="A")),
+    asyncio.create_task(async_delay(name="B")),
+    asyncio.create_task(async_delay(name="C")),
   )
 
   print("common_counter", common_counter)