diff --git a/src/_pytest/doctest.py b/src/_pytest/doctest.py
index e6f666dda..c3dbf84c2 100644
--- a/src/_pytest/doctest.py
+++ b/src/_pytest/doctest.py
@@ -579,9 +579,11 @@ def _setup_fixtures(doctest_item: DoctestItem) -> TopRequest:
 
     doctest_item.funcargs = {}  # type: ignore[attr-defined]
     fm = doctest_item.session._fixturemanager
-    doctest_item._fixtureinfo = fm.getfixtureinfo(  # type: ignore[attr-defined]
+    fixtureinfo = fm.getfixtureinfo(
         node=doctest_item, func=func, cls=None, funcargs=False
     )
+    doctest_item._fixtureinfo = fixtureinfo  # type: ignore[attr-defined]
+    doctest_item.fixturenames = fixtureinfo.names_closure  # type: ignore[attr-defined]
     fixture_request = TopRequest(doctest_item, _ispytest=True)  # type: ignore[arg-type]
     fixture_request._fillfixtures()
     return fixture_request
diff --git a/src/_pytest/fixtures.py b/src/_pytest/fixtures.py
index c7fc28adb..e692c9489 100644
--- a/src/_pytest/fixtures.py
+++ b/src/_pytest/fixtures.py
@@ -210,16 +210,14 @@ def reorder_items(items: Sequence[nodes.Item]) -> List[nodes.Item]:
     argkeys_cache: Dict[Scope, Dict[nodes.Item, Dict[FixtureArgKey, None]]] = {}
     items_by_argkey: Dict[Scope, Dict[FixtureArgKey, Deque[nodes.Item]]] = {}
     for scope in HIGH_SCOPES:
-        d: Dict[nodes.Item, Dict[FixtureArgKey, None]] = {}
-        argkeys_cache[scope] = d
-        item_d: Dict[FixtureArgKey, Deque[nodes.Item]] = defaultdict(deque)
-        items_by_argkey[scope] = item_d
+        scoped_argkeys_cache = argkeys_cache[scope] = {}
+        scoped_items_by_argkey = items_by_argkey[scope] = defaultdict(deque)
         for item in items:
             keys = dict.fromkeys(get_parametrized_fixture_keys(item, scope), None)
             if keys:
-                d[item] = keys
+                scoped_argkeys_cache[item] = keys
                 for key in keys:
-                    item_d[key].append(item)
+                    scoped_items_by_argkey[key].append(item)
     items_dict = dict.fromkeys(items, None)
     return list(
         reorder_items_atscope(items_dict, argkeys_cache, items_by_argkey, Scope.Session)
@@ -407,7 +405,7 @@ class FixtureRequest(abc.ABC):
     @property
     def fixturenames(self) -> List[str]:
         """Names of all active fixtures in this request."""
-        result = list(self._pyfuncitem._fixtureinfo.names_closure)
+        result = list(self._pyfuncitem.fixturenames)
         result.extend(set(self._fixture_defs).difference(result))
         return result
 
@@ -687,8 +685,7 @@ class TopRequest(FixtureRequest):
 
     def _fillfixtures(self) -> None:
         item = self._pyfuncitem
-        fixturenames = getattr(item, "fixturenames", self.fixturenames)
-        for argname in fixturenames:
+        for argname in item.fixturenames:
             if argname not in item.funcargs:
                 item.funcargs[argname] = self.getfixturevalue(argname)
 
@@ -794,7 +791,10 @@ class SubRequest(FixtureRequest):
         # If the executing fixturedef was not explicitly requested in the argument list (via
         # getfixturevalue inside the fixture call) then ensure this fixture def will be finished
         # first.
-        if fixturedef.argname not in self.fixturenames:
+        if (
+            fixturedef.argname not in self._fixture_defs
+            and fixturedef.argname not in self._pyfuncitem.fixturenames
+        ):
             fixturedef.addfinalizer(
                 functools.partial(self._fixturedef.finish, request=self)
             )
diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index df1eb854d..e8d55c929 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -473,7 +473,9 @@ class PyCollector(PyobjMixin, nodes.Collector):
         clscol = self.getparent(Class)
         cls = clscol and clscol.obj or None
 
-        definition = FunctionDefinition.from_parent(self, name=name, callobj=funcobj)
+        definition: FunctionDefinition = FunctionDefinition.from_parent(
+            self, name=name, callobj=funcobj
+        )
         fixtureinfo = definition._fixtureinfo
 
         # pytest_generate_tests impls call metafunc.parametrize() which fills
@@ -1123,9 +1125,9 @@ class CallSpec2:
     # arg name -> arg index.
     indices: Dict[str, int] = dataclasses.field(default_factory=dict)
     # Used for sorting parametrized resources.
-    _arg2scope: Dict[str, Scope] = dataclasses.field(default_factory=dict)
+    _arg2scope: Mapping[str, Scope] = dataclasses.field(default_factory=dict)
     # Parts which will be added to the item's name in `[..]` separated by "-".
-    _idlist: List[str] = dataclasses.field(default_factory=list)
+    _idlist: Sequence[str] = dataclasses.field(default_factory=tuple)
     # Marks which will be applied to the item.
     marks: List[Mark] = dataclasses.field(default_factory=list)
 
@@ -1141,7 +1143,7 @@ class CallSpec2:
     ) -> "CallSpec2":
         params = self.params.copy()
         indices = self.indices.copy()
-        arg2scope = self._arg2scope.copy()
+        arg2scope = dict(self._arg2scope)
         for arg, val in zip(argnames, valset):
             if arg in params:
                 raise ValueError(f"duplicate parametrization of {arg!r}")