diff --git a/stdlib/2and3/pprint.pyi b/stdlib/2and3/pprint.pyi
index d257cb0d6..6b14e7d8a 100644
--- a/stdlib/2and3/pprint.pyi
+++ b/stdlib/2and3/pprint.pyi
@@ -8,19 +8,19 @@ from typing import Any, Dict, Tuple, IO, Optional
 
 if sys.version_info >= (3, 8):
     def pformat(
-        o: object, indent: int = ..., width: int = ..., depth: Optional[int] = ..., *, compact: bool = ..., sort_dicts: bool = ...
+        object: object, indent: int = ..., width: int = ..., depth: Optional[int] = ..., *, compact: bool = ..., sort_dicts: bool = ...
     ) -> str: ...
 
 elif sys.version_info >= (3, 4):
-    def pformat(o: object, indent: int = ..., width: int = ...,
+    def pformat(object: object, indent: int = ..., width: int = ...,
                 depth: Optional[int] = ..., *, compact: bool = ...) -> str: ...
 else:
-    def pformat(o: object, indent: int = ..., width: int = ...,
+    def pformat(object: object, indent: int = ..., width: int = ...,
                 depth: Optional[int] = ...) -> str: ...
 
 if sys.version_info >= (3, 8):
     def pp(
-        o: object,
+        object: object,
         stream: Optional[IO[str]] = ...,
         indent: int = ...,
         width: int = ...,
@@ -32,7 +32,7 @@ if sys.version_info >= (3, 8):
 
 if sys.version_info >= (3, 8):
     def pprint(
-        o: object,
+        object: object,
         stream: Optional[IO[str]] = ...,
         indent: int = ...,
         width: int = ...,
@@ -43,15 +43,15 @@ if sys.version_info >= (3, 8):
     ) -> None: ...
 
 elif sys.version_info >= (3, 4):
-    def pprint(o: object, stream: Optional[IO[str]] = ..., indent: int = ..., width: int = ...,
+    def pprint(object: object, stream: Optional[IO[str]] = ..., indent: int = ..., width: int = ...,
                depth: Optional[int] = ..., *, compact: bool = ...) -> None: ...
 else:
-    def pprint(o: object, stream: Optional[IO[str]] = ..., indent: int = ..., width: int = ...,
+    def pprint(object: object, stream: Optional[IO[str]] = ..., indent: int = ..., width: int = ...,
                depth: Optional[int] = ...) -> None: ...
 
-def isreadable(o: object) -> bool: ...
-def isrecursive(o: object) -> bool: ...
-def saferepr(o: object) -> str: ...
+def isreadable(object: object) -> bool: ...
+def isrecursive(object: object) -> bool: ...
+def saferepr(object: object) -> str: ...
 
 class PrettyPrinter:
     if sys.version_info >= (3, 8):
@@ -72,9 +72,9 @@ class PrettyPrinter:
         def __init__(self, indent: int = ..., width: int = ..., depth: Optional[int] = ...,
                      stream: Optional[IO[str]] = ...) -> None: ...
 
-    def pformat(self, o: object) -> str: ...
-    def pprint(self, o: object) -> None: ...
-    def isreadable(self, o: object) -> bool: ...
-    def isrecursive(self, o: object) -> bool: ...
-    def format(self, o: object, context: Dict[int, Any], maxlevels: int,
+    def pformat(self, object: object) -> str: ...
+    def pprint(self, object: object) -> None: ...
+    def isreadable(self, object: object) -> bool: ...
+    def isrecursive(self, object: object) -> bool: ...
+    def format(self, object: object, context: Dict[int, Any], maxlevels: int,
                level: int) -> Tuple[str, bool, bool]: ...