turn warnings into errors on pyargs runs

asdf/conftest.py

@@ -8,6 +8,14 @@
 collect_ignore = ["asdf.py", "stream.py"]
 
 
+def pytest_collection_modifyitems(items):
+    # Turn warnings into errors for all tests, this is needed
+    # as running tests through pyargs will not use settings
+    # defined in pyproject.toml
+    for item in items:
+        item.add_marker(pytest.mark.filterwarnings("error"), False)
+
+
 @pytest.fixture(scope="session", autouse=True)
 def _temp_cwd(tmp_path_factory):
     """

pyproject.toml

@@ -105,7 +105,7 @@ norecursedirs = ['build', 'docs/_build', 'docs/sphinxext']
 doctest_plus = 'enabled'
 remote_data_strict = true
 filterwarnings = [
-    'error',
+    'error',  # also set in _tests/conftest to work with pyargs
     'ignore:numpy.ndarray size changed:RuntimeWarning',
 ]
 # Configuration for pytest-doctestplus