mark the failing test for pytest-dev#3742 as strict xfail so we can merge the pr about testing

Author: RonnyPfannschmidt

changelog/3751.trivial.rst

@@ -0,0 +1 @@
+Add a xfailing test for the `regression introduced by package scope <https://github.com/pytest-dev/pytest/issues/3742>`_.

testing/python/fixture.py

@@ -1619,6 +1619,9 @@ def test_package(one):
         reprec = testdir.inline_run()
         reprec.assertoutcome(passed=2)
 
+    @pytest.mark.xfail(
+        strict=True, reason="https://github.com/pytest-dev/pytest/issues/3742"
+    )
     def test_collect_custom_items(self, testdir):
         testdir.copy_example("fixtures/custom_item")
         result = testdir.runpytest("foo")