Test fails straight out of the box

I've cloned the repository, and tried running the unittest test.test_itertext. This test doesn't require to set up the sherlock model. It reads the text files that come with the package and makes the models inside the test, so i didn't have any input into it. The error i keep getting is this:

(base) C:\Users\JGC\Desktop\Trabalhos\Python\markovify>python -m unittest test.test_itertext
EE.E
======================================================================
ERROR: test_from_json_without_retaining (test.test_itertext.MarkovifyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\test\test_itertext.py", line 25, in test_from_json_without_retaining 
    original_model = markovify.Text(f, retain_original=False)
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 53, in __init__
    parsed = parsed_sentences or self.generate_corpus(input_text)
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 152, in generate_corpus
    for line in text:
  File "C:\Users\JGC\anaconda3\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 3552: character maps to <undefined>

======================================================================
ERROR: test_from_mult_files_without_retaining (test.test_itertext.MarkovifyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\test\test_itertext.py", line 37, in test_from_mult_files_without_retaining
    models.append(markovify.Text(f, retain_original=False))
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 53, in __init__
    parsed = parsed_sentences or self.generate_corpus(input_text)
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 152, in generate_corpus
    for line in text:
  File "C:\Users\JGC\anaconda3\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 3552: character maps to <undefined>

======================================================================
ERROR: test_without_retaining (test.test_itertext.MarkovifyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\test\test_itertext.py", line 18, in test_without_retaining
    senate_model = markovify.Text(f, retain_original=False)
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 53, in __init__
    parsed = parsed_sentences or self.generate_corpus(input_text)
  File "C:\Users\JGC\Desktop\Trabalhos\Python\markovify\markovify\text.py", line 152, in generate_corpus
    for line in text:
  File "C:\Users\JGC\anaconda3\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 3552: character maps to <undefined>

----------------------------------------------------------------------
Ran 4 tests in 0.725s

FAILED (errors=3)

Running a conda 3.7.6 environment on Windows 10.

Read test/test_itertext.py and markovify/text.py around Text and generate_corpus, then reproduce the failure with python -m unittest test.test_itertext on Windows. Trace how the text files are opened and decoded; done means the affected tests pass in the reported environment.