code: def test_for_invalid_filepath():
      filepath = "junk_file_path.csv"
      result = _check_events_file_uses_tab_separators(
          events_files=filepath
      )
      assert result is None
  
file_path: nilearn/nilearn/glm/tests/test_check_events_file_uses_tab_separators.py
imports: import pandas
  import pytest
  from nilearn.glm.first_level.first_level import _check_events_file_uses_tab_separators
label_desc: Use image node_id 7 for calling a global function with example usage: test_for_invalid_filepath() without return types