From 63d491a8f7d476381d2826f46a638d536e54521e Mon Sep 17 00:00:00 2001
From: hauntsaninja <hauntsaninja@gmail.com>
Date: Sat, 9 Mar 2024 00:08:47 -0800
Subject: [PATCH] Fix type narrowing for types.EllipsisType

Fixes #17002
---
 mypy/types.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mypy/types.py b/mypy/types.py
index f76e35784d8f..14a3e1a47956 100644
--- a/mypy/types.py
+++ b/mypy/types.py
@@ -1524,7 +1524,7 @@ def is_singleton_type(self) -> bool:
         return (
             self.type.is_enum
             and len(self.get_enum_values()) == 1
-            or self.type.fullname == "builtins.ellipsis"
+            or self.type.fullname in {"builtins.ellipsis", "types.EllipsisType"}
         )
 
     def get_enum_values(self) -> list[str]: