diff --git a/stdlib/3.7/_py_abc.pyi b/stdlib/3.7/_py_abc.pyi
index 89106b956..c8fd1f918 100644
--- a/stdlib/3.7/_py_abc.pyi
+++ b/stdlib/3.7/_py_abc.pyi
@@ -6,5 +6,5 @@ _T = TypeVar("_T")
 def get_cache_token() -> object: ...
 
 class ABCMeta(type):
-    def __new__(mcls, __name: str, __bases: Tuple[Type[Any], ...], __namespace: Dict[str, Any]) -> ABCMeta: ...
+    def __new__(cls, __name: str, __bases: Tuple[Type[Any], ...], __namespace: Dict[str, Any]) -> ABCMeta: ...
     def register(cls, subclass: Type[_T]) -> Type[_T]: ...
diff --git a/third_party/2and3/boto/s3/bucket.pyi b/third_party/2and3/boto/s3/bucket.pyi
index f92818ff6..7e61cba54 100644
--- a/third_party/2and3/boto/s3/bucket.pyi
+++ b/third_party/2and3/boto/s3/bucket.pyi
@@ -7,7 +7,7 @@ from .key import Key
 class S3WebsiteEndpointTranslate:
     trans_region: Dict[str, str]
     @classmethod
-    def translate_region(self, reg: Text) -> str: ...
+    def translate_region(cls, reg: Text) -> str: ...
 
 S3Permissions: List[str]
 
diff --git a/third_party/2and3/pynamodb/indexes.pyi b/third_party/2and3/pynamodb/indexes.pyi
index 562c833d2..99db1146b 100644
--- a/third_party/2and3/pynamodb/indexes.pyi
+++ b/third_party/2and3/pynamodb/indexes.pyi
@@ -10,7 +10,7 @@ class Index(metaclass=IndexMeta):
     def count(cls, hash_key, consistent_read: bool = ..., **filters) -> int: ...
     @classmethod
     def query(
-        self,
+        cls,
         hash_key,
         scan_index_forward: Optional[Any] = ...,
         consistent_read: bool = ...,