Update test to avoid CI rewriting it and breaking it

Author: pirate

testing/test_pluginmanager.py

@@ -124,16 +124,15 @@ class A:
 
 
 def test_register_skips_properties(he_pm: PluginManager) -> None:
-    property_was_executed = False
-
     class A:
         @property
         def some_func(self):
-            pass
+            self.property_was_executed = True
+            return None
 
     a = A()
     he_pm.register(a)
-    assert not property_was_executed
+    assert not a.property_was_executed
 
 
 def test_register_skips_pydantic_fields(he_pm: PluginManager) -> None: