From 573ac89692b43eb77e2d49b571740d217fedbd79 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Sun, 24 May 2020 19:09:46 -0700
Subject: [PATCH] stubtest: fix false negatives

If the stub doesn't list dunder methods, we wouldn't check them earlier.
There are a lot of false negatives due to this.
---
 mypy/stubtest.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mypy/stubtest.py b/mypy/stubtest.py
index 245148c9eab3..3dc0468868bd 100644
--- a/mypy/stubtest.py
+++ b/mypy/stubtest.py
@@ -237,8 +237,11 @@ def verify_typeinfo(
         return
 
     to_check = set(stub.names)
+    dunders_to_check = ("__init__", "__new__", "__call__")
     # cast to workaround mypyc complaints
-    to_check.update(m for m in cast(Any, vars)(runtime) if not m.startswith("_"))
+    to_check.update(
+        m for m in cast(Any, vars)(runtime) if m in dunders_to_check or not m.startswith("_")
+    )
 
     for entry in sorted(to_check):
         mangled_entry = entry