Fix a bug

src/_pytest/fixtures.py

@@ -1414,11 +1414,10 @@ class FixtureManager:
             tuple(self._getautousenames(node.nodeid)) + usefixtures + argnames
         )
 
-        arg2fixturedefs: Dict[str, Sequence[FixtureDef[Any]]] = {}
-        names_closure = self.getfixtureclosure(
+        names_closure, arg2fixturedefs = self.getfixtureclosure(
             node,
             initialnames,
-            arg2fixturedefs,
+            None,
             ignore_args=_get_direct_parametrize_args(node),
         )
         return FuncFixtureInfo(
@@ -1461,9 +1460,9 @@ class FixtureManager:
         self,
         parentnode: nodes.Node,
         initialnames: Tuple[str, ...],
-        arg2fixturedefs: Dict[str, Sequence[FixtureDef[Any]]],
+        arg2fixturedefs: Union[Dict[str, Sequence[FixtureDef[Any]]], None],
         ignore_args: Sequence[str] = (),
-    ) -> List[str]:
+    ) -> Tuple[List[str], Dict[str, Sequence[FixtureDef[Any]]]]:
         # Collect the closure of all fixtures, starting with the given
         # initialnames containing function arguments, `usefixture` markers
         # and `autouse` fixtures as the initial set.  As we have to visit all
@@ -1474,6 +1473,8 @@ class FixtureManager:
 
         fixturenames_closure = initialnames
 
+        if arg2fixturedefs is None:
+            arg2fixturedefs = {}
         lastlen = -1
         parentid = parentnode.nodeid
         while lastlen != len(fixturenames_closure):
@@ -1498,7 +1499,10 @@ class FixtureManager:
             else:
                 return fixturedefs[-1]._scope
 
-        return sorted(fixturenames_closure, key=sort_by_scope, reverse=True)
+        return (
+            sorted(fixturenames_closure, key=sort_by_scope, reverse=True),
+            arg2fixturedefs,
+        )
 
     def pytest_generate_tests(self, metafunc: "Metafunc") -> None:
         """Generate new tests based on parametrized fixtures used by the given metafunc"""

src/_pytest/python.py

@@ -381,21 +381,9 @@ del _EmptyClass
 # fmt: on
 
 
-def prune_dependency_tree_if_test_is_dynamically_parametrized(metafunc):
+def check_if_test_is_dynamically_parametrized(metafunc):
     if metafunc._calls:
-        # Dynamic direct parametrization may have shadowed some fixtures
-        # so make sure we update what the function really needs. Note that
-        # we didn't need to do this if only indirect dynamic parametrization
-        # had taken place, but anyway we did it as differentiating between direct
-        # and indirect requires a dirty hack.
-        definition = metafunc.definition
-        fixture_closure = definition.parent.session._fixturemanager.getfixtureclosure(
-            definition,
-            definition._fixtureinfo.initialnames,
-            definition._fixtureinfo.name2fixturedefs,
-            ignore_args=_get_direct_parametrize_args(definition) + ["request"],
-        )
-        definition._fixtureinfo.names_closure[:] = fixture_closure
+        setattr(metafunc, "has_dynamic_parametrize", True)
 
 
 class PyCollector(PyobjMixin, nodes.Collector):
@@ -502,7 +490,7 @@ class PyCollector(PyobjMixin, nodes.Collector):
             module=module,
             _ispytest=True,
         )
-        methods = [prune_dependency_tree_if_test_is_dynamically_parametrized]
+        methods = [check_if_test_is_dynamically_parametrized]
         if hasattr(module, "pytest_generate_tests"):
             methods.append(module.pytest_generate_tests)
         if cls is not None and hasattr(cls, "pytest_generate_tests"):
@@ -516,6 +504,20 @@ class PyCollector(PyobjMixin, nodes.Collector):
             yield Function.from_parent(self, name=name, fixtureinfo=fixtureinfo)
         else:
 
+            if hasattr(metafunc, "has_dynamic_parametrize"):
+                # add_funcarg_pseudo_fixture_def may have shadowed some fixtures
+                # due to dynamic direct parametrization so make sure we update
+                # what the function really needs. Note that we didn't need to do this if
+                # only indirect dynamic parametrization had taken place, but anyway we did
+                # it as differentiating between direct and indirect requires a dirty hack.
+                fixture_closure, _ = fm.getfixtureclosure(
+                    definition,
+                    fixtureinfo.initialnames,
+                    fixtureinfo.name2fixturedefs,
+                    ignore_args=_get_direct_parametrize_args(definition),
+                )
+                fixtureinfo.names_closure[:] = fixture_closure
+
             for callspec in metafunc._calls:
                 subname = f"{name}[{callspec.id}]"
                 yield Function.from_parent(

testing/python/fixtures.py

@@ -4537,7 +4537,9 @@ def test_yield_fixture_with_no_value(pytester: Pytester) -> None:
 
 
 @pytest.mark.xfail(
-    reason="arg2fixturedefs should get updated on dynamic parametrize. This gets solved by PR#11220"
+    reason="fixtureclosure should get updated before fixtures.py::pytest_generate_tests"
+    " and after modifying arg2fixturedefs when there's direct"
+    " dynamic parametrize. This gets solved by PR#11220"
 )
 def test_fixture_info_after_dynamic_parametrize(pytester: Pytester) -> None:
     pytester.makeconftest(
@@ -4575,7 +4577,7 @@ def test_fixture_info_after_dynamic_parametrize(pytester: Pytester) -> None:
             assert fixture2 in (4, 5)
         """
     )
-    res = pytester.inline_run("-s")
+    res = pytester.inline_run()
     res.assertoutcome(passed=2)