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-rw-r--r--tests/typing_test_data.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/typing_test_data.py b/tests/typing_test_data.py
index 76db7c898..70c3144a0 100644
--- a/tests/typing_test_data.py
+++ b/tests/typing_test_data.py
@@ -96,6 +96,10 @@ def f19(*args: int, **kwargs: str):
pass
+def f20() -> Optional[Union[int, str]]:
+ pass
+
+
class Node:
def __init__(self, parent: Optional['Node']) -> None: