# This file is used to configure the behavior of pytest when using the Astropy
# test infrastructure.
import os

from astropy.version import version as astropy_version
if astropy_version < '3.0':
    # With older versions of Astropy, we actually need to import the pytest
    # plugins themselves in order to make them discoverable by pytest.
    from astropy.tests.pytest_plugins import *
else:
    # As of Astropy 3.0, the pytest plugins provided by Astropy are
    # automatically made available when Astropy is installed. This means it's
    # not necessary to import them here, but we still need to import global
    # variables that are used for configuration.
    from astropy.tests.plugins.display import PYTEST_HEADER_MODULES, TESTED_VERSIONS

from astropy.tests.helper import enable_deprecations_as_exceptions

## Uncomment the following line to treat all DeprecationWarnings as
## exceptions. For Astropy v2.0 or later, there are 2 additional keywords,
## as follow (although default should work for most cases).
## To ignore some packages that produce deprecation warnings on import
## (in addition to 'compiler', 'scipy', 'pygments', 'ipykernel', and
## 'setuptools'), add:
##     modules_to_ignore_on_import=['module_1', 'module_2']
## To ignore some specific deprecation warning messages for Python version
## MAJOR.MINOR or later, add:
##     warnings_to_ignore_by_pyver={(MAJOR, MINOR): ['Message to ignore']}
# enable_deprecations_as_exceptions()

# Customize the following lines to add/remove entries from
# the list of packages for which version numbers are displayed when running
# the tests. Making it pass for KeyError is essential in some cases when
# the package uses other astropy affiliated packages.
try:
    PYTEST_HEADER_MODULES['Astropy'] = 'astropy'
    del PYTEST_HEADER_MODULES['h5py']
except KeyError:
    pass

# This is to figure out the package version, rather than
# using Astropy's
from .version import version, astropy_helpers_version

packagename = os.path.basename(os.path.dirname(__file__))
TESTED_VERSIONS[packagename] = version
TESTED_VERSIONS['astropy_helpers'] = astropy_helpers_version

Create conftest.py