Mark yield_fixture as deprecated

changelog/14340.improvement.rst

@@ -0,0 +1 @@
+Marked ``yield_fixture`` as deprecated with ``deprecated`` decorator.

src/_pytest/fixtures.py

@@ -32,6 +32,7 @@
 from typing import TypeVar
 import warnings
 
+from .compat import deprecated
 import _pytest
 from _pytest import nodes
 from _pytest._code import getfslineno
@@ -1416,6 +1417,9 @@ def fixture(
     return fixture_marker
 
 
+@deprecated(
+    "pytest.yield_fixture is deprecated, use pytest.fixture to access configuration values instead.",
+)
 def yield_fixture(
     fixture_function=None,
     *args,

src/pytest/__init__.py

@@ -26,7 +26,7 @@
 from _pytest.fixtures import FixtureDef
 from _pytest.fixtures import FixtureLookupError
 from _pytest.fixtures import FixtureRequest
-from _pytest.fixtures import yield_fixture
+from _pytest.fixtures import yield_fixture  # type: ignore[deprecated]
 from _pytest.freeze_support import freeze_includes
 from _pytest.legacypath import TempdirFactory
 from _pytest.legacypath import Testdir

testing/deprecated_test.py

@@ -68,7 +68,7 @@ def pytest_runtest_call(self):
 def test_yield_fixture_is_deprecated() -> None:
     with pytest.warns(DeprecationWarning, match=r"yield_fixture is deprecated"):
 
-        @pytest.yield_fixture
+        @pytest.yield_fixture  # type: ignore[deprecated]
         def fix():
             assert False