code: def test_find_audio_files_in_paths_uppercase_extension(self):
      file_paths = find_audio_files_in_paths(
          DEMO_DIR, traverse_subdirectories=False
      )
      found_it = False
      for file_path in file_paths:
          if file_path.name == "stereo_24bit.WAV":
              found_it = True
              break
      assert found_it
  
file_path: audiomentations/tests/test_utils.py
imports: import os
  import numpy
  import pytest
  from audiomentations.core.utils import calculate_desired_noise_rms, convert_decibels_to_amplitude_ratio, find_audio_files_in_paths, calculate_rms, calculate_rms_without_silence
  from demo.demo import DEMO_DIR
label_desc: Use image node_id 3 for calling the TestUtils obj's underlying member method code with example usage: obj.test_find_audio_files_in_paths_uppercase_extension() without return types