Problems to cover the tests

I am working with Django 3.0.3 and have created a few tests to test my views. I wanted to have the metrics for the coverages, so I installed (with pip) the module coverage.

With the tests there is no problem it solves them perfectly:

    >python manage.py test uMap
    Creating test database for alias 'default'...
    2020-04-02 11:10:20,748 asyncio      DEBUG    Using selector: SelectSelector
     System check identified no issues (0 silenced).
    .....
     ----------------------------------------------------------------------
    Ran 5 tests in 1.372s

     OK
     Destroying test database for alias 'default'...

The problem is when trying to cover. According to the python documentation, the way to run it is as follows (but it gives me error in manage.py):

coverage run --source='.' manage.py test uMap
Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\core\management\__init__.py", line 377, in execute
    django.setup()
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\apps\registry.py", line 114, in populate
    app_config.import_models()
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\apps\config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\auth\models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\auth\base_user.py", line 47, in <module>
    class AbstractBaseUser(models.Model):
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\models\base.py", line 121, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\models\base.py", line 325, in add_to_class
    value.contribute_to_class(cls, name)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\models\options.py", line 208, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\utils.py", line 207, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\db\utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\backends\postgis\base.py", line 6, in <module>
    from .features import DatabaseFeatures
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\backends\postgis\features.py", line 1, in <module>
    from django.contrib.gis.db.backends.base.features import BaseSpatialFeatures
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\backends\base\features.py", line 3, in <module>
    from django.contrib.gis.db.models import aggregates
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\models\__init__.py", line 3, in <module>
    import django.contrib.gis.db.models.functions  # NOQA
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\models\functions.py", line 3, in <module>
    from django.contrib.gis.db.models.fields import BaseSpatialField, GeometryField
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\db\models\fields.py", line 3, in <module>
    from django.contrib.gis import forms, gdal
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\forms\__init__.py", line 3, in <module>
    from .fields import (  # NOQA
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\forms\fields.py", line 2, in <module>
    from django.contrib.gis.gdal import GDALException
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\gdal\__init__.py", line 28, in <module>
    from django.contrib.gis.gdal.datasource import DataSource
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\gdal\datasource.py", line 39, in <module>
    from django.contrib.gis.gdal.driver import Driver
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\gdal\driver.py", line 5, in <module>
    from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\gdal\prototypes\ds.py", line 9, in <module>
    from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\site-packages\django\contrib\gis\gdal\libgdal.py", line 46, in <module>
    lgdal = CDLL(lib_path)
  File "c:\users\jalvarfe\appdata\local\continuum\anaconda3\envs\py-usim\lib\ctypes\__init__.py", line 364, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: [WinError 127] No se encontró el proceso especificado

I understand that it is a problem due to the gdal module and I don't understand why it doesn't give me that error when running the tests, but I don't know how to fix it. Any ideas?

Thanks a lot