code: def set_test_pip_version() -> None:
      os.environ["JINA_GATEWAY_IMAGE"] = "jinaai/jina:test-pip"
      yield
      if (
          "JINA_GATEWAY_IMAGE" in os.environ
      ):  # maybe another fixture has already removed
          del os.environ["JINA_GATEWAY_IMAGE"]
  
file_path: jina/tests/conftest.py
imports: import asyncio
  import os
  import random
  import string
  import tempfile
  import time
  import pytest
  from jina import helper
label_desc: Use image node_id 11 for calling a global function with example usage: set_test_pip_version() without return types