fix: avoid deprecated nodeid argument to _register_fixture

CHANGES.rst

@@ -34,6 +34,7 @@ Fixed
 * Backslashes in datatable and examples table cells are no longer over-quoted. A cell containing a single backslash now reaches the step as a single backslash, matching the Gherkin escaping rules. If you compensated by doubling backslashes in feature files, undo that. `#769 <https://github.com/pytest-dev/pytest-bdd/issues/769>`_
 * Made type annotations stronger and removed most of the ``typing.Any`` usages and ``# type: ignore`` annotations. `#658 <https://github.com/pytest-dev/pytest-bdd/pull/658>`_
 * Empty docstrings are now correctly forwarded to step functions as an empty string instead of being silently dropped, which previously caused pytest to report a missing ``docstring`` fixture. `#809 <https://github.com/pytest-dev/pytest-bdd/issues/809>`_
+* Injecting a ``target_fixture`` no longer emits ``PytestRemovedIn10Warning`` on pytest 9.1+, which deprecated passing ``nodeid`` to ``_register_fixture``. `#823 <https://github.com/pytest-dev/pytest-bdd/issues/823>`_
 
 Security
 ++++++++

src/pytest_bdd/compat.py

@@ -25,11 +25,17 @@ def inject_fixture(request: FixtureRequest, arg: str, value: object) -> None:
         :param arg: argument name
         :param value: argument value
         """
-        # Ensure there's a fixture definition for the argument
+        # Ensure there's a fixture definition for the argument.
+        # pytest 9.1 deprecated the ``nodeid`` argument in favour of ``node``.
+        scoping: dict[str, object]
+        if pytest_version.release >= (9, 1):
+            scoping = {"node": request.node}
+        else:
+            scoping = {"nodeid": request.node.nodeid}
         request._fixturemanager._register_fixture(
             name=arg,
             func=lambda: value,
-            nodeid=request.node.nodeid,
+            **scoping,  # type: ignore[arg-type]
         )
         # Note the fixture we just registered will have a lower priority
         # if there was already one registered, so we need to force its value

tests/steps/test_given.py

@@ -41,3 +41,42 @@ def _(foo):
     )
     result = pytester.runpytest()
     result.assert_outcomes(passed=1)
+
+
+def test_given_injection_no_deprecation_warning(pytester):
+    """Injecting a target fixture must not emit pytest deprecation warnings."""
+    pytester.makefile(
+        ".feature",
+        given=textwrap.dedent(
+            """\
+            Feature: Given
+                Scenario: Test given fixture injection
+                    Given I have injecting given
+                    Then foo should be "injected foo"
+            """
+        ),
+    )
+    pytester.makepyfile(
+        textwrap.dedent(
+            """\
+        from pytest_bdd import given, then, scenario
+
+        @scenario("given.feature", "Test given fixture injection")
+        def test_given():
+            pass
+
+
+        @given("I have injecting given", target_fixture="foo")
+        def _():
+            return "injected foo"
+
+
+        @then('foo should be "injected foo"')
+        def _(foo):
+            assert foo == "injected foo"
+
+        """
+        )
+    )
+    result = pytester.runpytest("-W", "error::DeprecationWarning", "-W", "error::PendingDeprecationWarning")
+    result.assert_outcomes(passed=1)