issue when running python -m spectral.tests.run`

[YannChemin]

`------------------------------------------------------------------------ Running SpyFile read tests on BSQ complex128 little-endian file without memmap...

Testing getitem_i_j......................................... OK Testing getitem_i_j_k....................................... OK Testing getitem_i_j_kslice.................................. OK Testing getitem_islice_jslice............................... OK Testing load................................................ OK Testing read_band........................................... OK Testing read_bands.......................................... OK Testing read_bands_duplicates............................... OK Testing read_bands_nonascending............................. OK Testing read_datum.......................................... OK Testing read_pixel.......................................... OK Testing read_subimage....................................... OK Testing read_subregion...................................... OK Traceback (most recent call last): File "", line 198, in _run_module_as_main File "", line 88, in _run_code File "/home/yann/dev/spectral/spectral/tests/run.py", line 43, in test.run() File "/home/yann/dev/spectral/spectral/tests/spyfile.py", line 342, in run tests = create_complex_test_files(dtypes) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yann/dev/spectral/spectral/tests/spyfile.py", line 314, in create_complex_test_files spy.envi.save_image(fname, X) File "/home/yann/dev/spectral/spectral/io/envi.py", line 455, in save_image _write_image(hdr_file, data, metadata, **kwargs) File "/home/yann/dev/spectral/spectral/io/envi.py", line 678, in _write_image (hdr_file, img_file) = check_new_filename(hdr_file, img_ext, force) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yann/dev/spectral/spectral/io/envi.py", line 375, in check_new_filename raise EnviException('Header file %s already exists. Use force ' spectral.io.envi.EnviException: Header file /home/yann/dev/spectral/spectral_test_files/test_complex64.hdr already exists. Use force keyword to force overwrite. `