--- a/lib/sqlalchemy/testing/plugin/pytestplugin.py
+++ b/lib/sqlalchemy/testing/plugin/pytestplugin.py
@@ -162,16 +162,19 @@ def pytest_collection_modifyitems(sessio
             if sub_cls is not test_class.cls:
                 per_cls_dict = rebuilt_items[test_class.cls]
 
-                # in pytest 5.4.0
-                # for inst in pytest.Class.from_parent(
-                #     test_class.parent.parent, name=sub_cls.__name__
-                # ).collect():
-
-                for inst in pytest.Class(
-                    sub_cls.__name__, parent=test_class.parent.parent
-                ).collect():
-                    for t in inst.collect():
-                        per_cls_dict[t.name].append(t)
+                if hasattr(pytest.Class, "from_parent"):
+                    # in pytest 5.4.0
+                    for inst in pytest.Class.from_parent(
+                        test_class.parent.parent, name=sub_cls.__name__
+                    ).collect():
+                        for t in inst.collect():
+                            per_cls_dict[t.name].append(t)
+                else:
+                    for inst in pytest.Class(
+                        sub_cls.__name__, parent=test_class.parent.parent
+                    ).collect():
+                        for t in inst.collect():
+                            per_cls_dict[t.name].append(t)
 
     newitems = []
     for item in items:
@@ -197,16 +200,17 @@ def pytest_pycollect_makeitem(collector,
     if inspect.isclass(obj) and plugin_base.want_class(name, obj):
 
         # in pytest 5.4.0
-        # return [
-        #     pytest.Class.from_parent(collector,
-        # name=parametrize_cls.__name__)
-        #     for parametrize_cls in _parametrize_cls(collector.module, obj)
-        # ]
-
-        return [
-            pytest.Class(parametrize_cls.__name__, parent=collector)
-            for parametrize_cls in _parametrize_cls(collector.module, obj)
-        ]
+        if hasattr(pytest.Class, "from_parent"):
+            return [
+                pytest.Class.from_parent(collector,
+            name=parametrize_cls.__name__)
+                for parametrize_cls in _parametrize_cls(collector.module, obj)
+            ]
+        else:
+            return [
+                pytest.Class(parametrize_cls.__name__, parent=collector)
+                for parametrize_cls in _parametrize_cls(collector.module, obj)
+            ]
     elif (
         inspect.isfunction(obj)
         and isinstance(collector, pytest.Instance)