code: def nb_tester():
      """Test notebooks using pytest-notebook"""
      nb_regression = NBRegressionFixture(
          diff_ignore=(
              "/metadata/language_info",
              "/cells/*/execution_count",
              "/cells/*/outputs/*",
          ),
          exec_timeout=1800,
      )
      return nb_regression
  
imports: import pytest
  from pytest_notebook.nb_regression import NBRegressionFixture
  from popmon.resources import notebook
label_desc: Use image node_id 1 for calling a global function with example usage: nb_tester() and returns: nb_regression