code: def test_error_if_tol_value_not_allowed(tol):
      # test case 5: threshold not between 0 and 1
      with pytest.raises(ValueError):
          DropConstantFeatures(tol=tol)
  
file_path: feature_engine/tests/test_selection/test_drop_constant_features.py
imports: import numpy
  import pandas
  import pytest
  from feature_engine.selection import DropConstantFeatures
label_desc: Use image node_id 5 for calling a global function with example usage: test_error_if_tol_value_not_allowed(tol) without return types