def test_observed_data(running_analysis_dir, dl1b_subdir, dl2_subdir):
    """Mock observed data files for testing."""
    dl1_file = running_analysis_dir / "dl1_LST-1.Run01808.0011.h5"
    muons_file = running_analysis_dir / "muons_LST-1.Run01808.0011.fits"
    dl1ab_file = dl1b_subdir / "dl1_LST-1.Run01808.0011.h5"
    datacheck_file = dl1b_subdir / "datacheck_dl1_LST-1.Run01808.0011.h5"
    dl2_file = dl2_subdir / "dl2_LST-1.Run01808.0011.h5"
    dl1_file.touch()
    muons_file.touch()
    dl1ab_file.touch()
    datacheck_file.touch()
    dl2_file.touch()
    return dl1_file, dl1ab_file, dl2_file, muons_file, datacheck_file