code: def test_mpi_adam():
      """Test RunningMeanStd object for MPI"""
      # Test will be run in CI before pytest is run
      pytest.skip()
      return_code = subprocess.call(
          [
              "mpirun",
              "--allow-run-as-root",
              "-np",
              "2",
              "python",
              "-m",
              "stable_baselines.common.mpi_adam",
          ]
      )
      _assert_eq(return_code, 0)
  
imports: import subprocess
  import pytest
  from .test_common import _assert_eq
label_desc: Use image node_id 1 for calling a global function with example usage: test_mpi_adam() without return types