diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index c21c150..32f8a41 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -72,7 +72,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip wheel setuptools
           python -m pip install pytest pytest-astropy pyyaml coveralls
-          python -m pip install numpy\<2.0 scipy matplotlib astropy
+          python -m pip install numpy\<2.0 scipy matplotlib astropy\<6.0
 
       - name: Run the test with coverage
         run: pytest --cov
diff --git a/conftest.py b/conftest.py
deleted file mode 100644
index 53f2bbe..0000000
--- a/conftest.py
+++ /dev/null
@@ -1,52 +0,0 @@
-# this contains imports plugins that configure py.test for astropy tests.
-# by importing them here in conftest.py they are discoverable by py.test
-# no matter how it is invoked within the source tree.
-
-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 pytest_astropy_header.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
-# enable_deprecations_as_exceptions()
-
-## Uncomment and 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'
-    PYTEST_HEADER_MODULES['Pillow'] = 'PIL'
-    PYTEST_HEADER_MODULES['PyYAML'] = 'yaml'
-    del PYTEST_HEADER_MODULES['h5py']
-    del PYTEST_HEADER_MODULES['Pandas']
-except (NameError, KeyError):  # NameError is needed to support Astropy < 1.0
-    pass
-
-## Uncomment the following lines to display the version number of the
-## package rather than the version number of Astropy in the top line when
-## running the tests.
-# import os
-#
-## This is to figure out the affiliated package version, rather than
-## using Astropy's
-# try:
-#     from .version import version
-# except ImportError:
-#     version = 'dev'
-#
-# try:
-#     packagename = os.path.basename(os.path.dirname(__file__))
-#     TESTED_VERSIONS[packagename] = version
-# except NameError:   # Needed to support Astropy <= 1.0.0
-#     pass
diff --git a/speclite/conftest.py b/speclite/conftest.py
index 53f2bbe..34b8161 100644
--- a/speclite/conftest.py
+++ b/speclite/conftest.py
@@ -14,7 +14,7 @@
     # variables that are used for configuration.
     from pytest_astropy_header.display import PYTEST_HEADER_MODULES, TESTED_VERSIONS
 
-from astropy.tests.helper import enable_deprecations_as_exceptions
+# from astropy.tests.helper import enable_deprecations_as_exceptions
 
 ## Uncomment the following line to treat all DeprecationWarnings as
 ## exceptions