diff --git a/mypy/stubtest.py b/mypy/stubtest.py
index 86d843c03c61..e82b5f8bcf96 100644
--- a/mypy/stubtest.py
+++ b/mypy/stubtest.py
@@ -1204,6 +1204,7 @@ def verify_typealias(
         "__hash__",
         "__getattr__",  # resulting behaviour might be typed explicitly
         "__setattr__",  # defining this on a class can cause worse type checking
+        "__vectorcalloffset__",  # undocumented implementation detail of the vectorcall protocol
         # isinstance/issubclass hooks that type-checkers don't usually care about
         "__instancecheck__",
         "__subclasshook__",