Do EnumType as well.

pyi.py

@@ -823,7 +823,12 @@ def _is_enum_class(node: ast.ClassDef) -> bool:
     return any(_is_enum_base(base) for base in node.bases)
 
 
-_COMMON_METACLASSES = {"type": "builtins", "ABCMeta": "abc", "EnumMeta": "enum"}
+_COMMON_METACLASSES = {
+    "type": "builtins",
+    "ABCMeta": "abc",
+    "EnumMeta": "enum",
+    "EnumType": "enum",
+}
 
 
 def _is_metaclass_base(node: ast.expr) -> bool:

tests/classdefs.pyi

@@ -3,8 +3,9 @@
 import abc
 import builtins
 import collections.abc
+import enum
 import typing
-from abc import abstractmethod
+from abc import ABCMeta, abstractmethod
 from collections.abc import (
     AsyncGenerator,
     AsyncIterable,
@@ -139,12 +140,18 @@ class MetaclassInWhichSelfCannotBeUsed2(EnumMeta):
     async def __aenter__(self) -> MetaclassInWhichSelfCannotBeUsed2: ...
     def __isub__(self, other: MetaclassInWhichSelfCannotBeUsed2) -> MetaclassInWhichSelfCannotBeUsed2: ...
 
-class MetaclassInWhichSelfCannotBeUsed3(abc.ABCMeta):
+class MetaclassInWhichSelfCannotBeUsed3(enum.EnumType):
     def __new__(cls) -> MetaclassInWhichSelfCannotBeUsed3: ...
     def __enter__(self) -> MetaclassInWhichSelfCannotBeUsed3: ...
     async def __aenter__(self) -> MetaclassInWhichSelfCannotBeUsed3: ...
     def __isub__(self, other: MetaclassInWhichSelfCannotBeUsed3) -> MetaclassInWhichSelfCannotBeUsed3: ...
 
+class MetaclassInWhichSelfCannotBeUsed4(ABCMeta):
+    def __new__(cls) -> MetaclassInWhichSelfCannotBeUsed4: ...
+    def __enter__(self) -> MetaclassInWhichSelfCannotBeUsed4: ...
+    async def __aenter__(self) -> MetaclassInWhichSelfCannotBeUsed4: ...
+    def __isub__(self, other: MetaclassInWhichSelfCannotBeUsed4) -> MetaclassInWhichSelfCannotBeUsed4: ...
+
 class Abstract(Iterator[str]):
     @abstractmethod
     def __iter__(self) -> Iterator[str]: ...