tests: Fix test suite with 3.13t build

[skip ci]

tests/event/test_event.py

@@ -31,8 +31,7 @@ def test_event_subclass_gc():
     with gc_disabled():
         event = PythonEvent('test_event_subclass_gc1')
 
-        assert len(gc.get_objects()) == 1
-        assert gc.get_objects()[0] == event
+        assert event in gc.get_objects()
 
         event = None
 

tests/pgraph/test_pandanode.py

@@ -144,8 +144,7 @@ def test_node_subclass_gc():
     with gc_disabled():
         node = NodeSubclass('test_node_subclass_gc1')
 
-        assert len(gc.get_objects()) == 1
-        assert gc.get_objects()[0] == node
+        assert node in gc.get_objects()
 
         node = None