diff --git a/stdlib/3/_markupbase.pyi b/stdlib/3/_markupbase.pyi
index 129b49b90..58d107052 100644
--- a/stdlib/3/_markupbase.pyi
+++ b/stdlib/3/_markupbase.pyi
@@ -1,6 +1,6 @@
 from typing import Tuple
 
-class ParserBase(object):
+class ParserBase:
     def __init__(self) -> None: ...
     def error(self, message: str) -> None: ...
     def reset(self) -> None: ...
diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 835119a81..095c6e736 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -80,7 +80,7 @@ class type:
     def __instancecheck__(self, instance: Any) -> bool: ...
     def __subclasscheck__(self, subclass: type) -> bool: ...
 
-class super(object):
+class super:
     @overload
     def __init__(self, t: Any, obj: Any) -> None: ...
     @overload
diff --git a/stdlib/3/calendar.pyi b/stdlib/3/calendar.pyi
index a9ce68684..957f8ce71 100644
--- a/stdlib/3/calendar.pyi
+++ b/stdlib/3/calendar.pyi
@@ -19,7 +19,7 @@ def leapdays(y1: int, y2: int) -> int: ...
 def weekday(year: int, month: int, day: int) -> int: ...
 def monthrange(year: int, month: int) -> Tuple[int, int]: ...
 
-class Calendar(object):
+class Calendar:
     def __init__(self, firstweekday: int = 0) -> None: ...
     def getfirstweekday(self) -> int: ...
     def setfirstweekday(self, firstweekday: int) -> None: ...
diff --git a/stdlib/3/difflib.pyi b/stdlib/3/difflib.pyi
index eaf068e35..f2fb7a879 100644
--- a/stdlib/3/difflib.pyi
+++ b/stdlib/3/difflib.pyi
@@ -47,7 +47,7 @@ def ndiff(a: Sequence[str], b: Sequence[str],
           charjunk: Callable[[str], bool] = ...
           ) -> Iterator[str]: ...
 
-class HtmlDiff(object):
+class HtmlDiff:
     def __init__(self, tabsize: int = ..., wrapcolumn: int = ...,
                  linejunk: Callable[[str], bool] = ...,
                  charjunk: Callable[[str], bool] = ...
diff --git a/stdlib/3/json.pyi b/stdlib/3/json.pyi
index 7b2e2e8d3..5dad703f2 100644
--- a/stdlib/3/json.pyi
+++ b/stdlib/3/json.pyi
@@ -50,7 +50,7 @@ def load(fp: IO[str],
     object_pairs_hook: Optional[Callable[[List[Tuple[Any, Any]]], Any]] = ...,
     **kwds: Any) -> Any: ...
 
-class JSONEncoder(object):
+class JSONEncoder:
     item_separator = ...  # type: str
     key_separator = ...  # type: str
 
@@ -69,7 +69,7 @@ class JSONEncoder(object):
     def encode(self, o: Any) -> str: ...
     def iterencode(self, o: Any, _one_shot: bool=False) -> Iterator[str]: ...
 
-class JSONDecoder(object):
+class JSONDecoder:
 
     object_hook = None  # type: Callable[[Dict[str, Any]], Any]
     parse_float = ...  # Callable[[str], Any]
diff --git a/third_party/3.6/click/utils.pyi b/third_party/3.6/click/utils.pyi
index d025643e2..3658295c0 100644
--- a/third_party/3.6/click/utils.pyi
+++ b/third_party/3.6/click/utils.pyi
@@ -57,7 +57,7 @@ class LazyFile:
         ...
 
 
-class KeepOpenFile(object):
+class KeepOpenFile:
     _file: IO
 
     def __init__(self, file: IO) -> None:
diff --git a/third_party/3/dateutil/parser.pyi b/third_party/3/dateutil/parser.pyi
index e69f2e2d5..fcd977557 100644
--- a/third_party/3/dateutil/parser.pyi
+++ b/third_party/3/dateutil/parser.pyi
@@ -4,7 +4,7 @@ from datetime import datetime
 __all__ = ...  # type: List[str]
 
 
-class parserinfo(object):
+class parserinfo:
     JUMP = ...  # type: List[str]
     WEEKDAYS = ...  # type: List[Tuple[str, str]]
     MONTHS = ...  # type: List[Tuple[str, str]]
@@ -27,7 +27,7 @@ class parserinfo(object):
     def validate(self, year: datetime) -> bool: ...
 
 
-class parser(object):
+class parser:
     def __init__(self, info: parserinfo=...) -> None: ...
 
     def parse(
@@ -45,7 +45,7 @@ def parse(timestr: Union[str, bytes, IO[Any]], parserinfo: parserinfo=..., **kwa
     ...
 
 
-class _tzparser(object):
+class _tzparser:
     ...
 
 
diff --git a/third_party/3/dateutil/relativedelta.pyi b/third_party/3/dateutil/relativedelta.pyi
index dc7e97bc0..f221a2082 100644
--- a/third_party/3/dateutil/relativedelta.pyi
+++ b/third_party/3/dateutil/relativedelta.pyi
@@ -4,7 +4,7 @@ from datetime import date, datetime, timedelta
 __all__ = ...  # type: List[str]
 
 
-class weekday(object):
+class weekday:
     def __init__(self, weekday: int, n: Optional[int]=...) -> None: ...
 
     def __call__(self, n: int) -> 'weekday': ...
@@ -25,7 +25,7 @@ SA = ...  # type: weekday
 SU = ...  # type: weekday
 
 
-class relativedelta(object):
+class relativedelta:
     def __init__(self,
                  dt1: Optional[date]=...,
                  dt2: Optional[date]=...,