python
diff --git a/‎Lib/test/test_annotationlib.py
Copy file name to clipboardExpand all lines: Lib/test/test_annotationlib.py
+22Lines changed: 22 additions & 0 deletions b/‎Lib/test/test_annotationlib.py
Copy file name to clipboardExpand all lines: Lib/test/test_annotationlib.py
+22Lines changed: 22 additions & 0 deletions
@@ -936,6 +936,28 @@ def __call__(self):
                         annotationlib.get_annotations(obj, format=format), {}
                     )
 
+    def test_union_forwardref(self):
+        # Test unions with '|' syntax equal unions with typing.Union[] with forwardrefs
+        class UnionForwardrefs:
+            pipe: str | undefined
+            union: Union[str, undefined]
+
+        annos = get_annotations(UnionForwardrefs, format=Format.FORWARDREF)
+
+        match = (
+            str,
+            support.EqualToForwardRef("undefined", is_class=True, owner=UnionForwardrefs)
+        )
+
+        self.assertEqual(
+            typing.get_args(annos["pipe"]),
+            typing.get_args(annos["union"])
+        )
+
+        self.assertEqual(typing.get_args(annos["pipe"]), match)
+        self.assertEqual(typing.get_args(annos["union"]), match)
+
+
     def test_pep695_generic_class_with_future_annotations(self):
         ann_module695 = inspect_stringized_annotations_pep695
         A_annotations = annotationlib.get_annotations(ann_module695.A, eval_str=True)