diff --git a/stdlib/3/os/__init__.pyi b/stdlib/3/os/__init__.pyi
index f7b3ded28..98042733e 100644
--- a/stdlib/3/os/__init__.pyi
+++ b/stdlib/3/os/__init__.pyi
@@ -382,7 +382,7 @@ else:
 def fstat(fd: int) -> stat_result: ...
 def fsync(fd: int) -> None: ...
 def lseek(__fd: int, __position: int, __how: int) -> int: ...
-def open(file: _PathType, flags: int, mode: int = ..., *, dir_fd: Optional[int] = ...) -> int: ...
+def open(path: _PathType, flags: int, mode: int = ..., *, dir_fd: Optional[int] = ...) -> int: ...
 def pipe() -> Tuple[int, int]: ...
 def read(__fd: int, __length: int) -> bytes: ...
 
@@ -578,11 +578,11 @@ def execlpe(file: _PathType, __arg0: Union[bytes, Text], *args: Any) -> NoReturn
 _ExecVArgs = Union[Tuple[Union[bytes, Text], ...], List[bytes], List[Text], List[Union[bytes, Text]]]
 _ExecEnv = Union[Mapping[bytes, Union[bytes, str]], Mapping[str, Union[bytes, str]]]
 def execv(__path: _PathType, __argv: _ExecVArgs) -> NoReturn: ...
-def execve(path: _FdOrPathType, args: _ExecVArgs, env: _ExecEnv) -> NoReturn: ...
+def execve(path: _FdOrPathType, argv: _ExecVArgs, env: _ExecEnv) -> NoReturn: ...
 def execvp(file: _PathType, args: _ExecVArgs) -> NoReturn: ...
 def execvpe(file: _PathType, args: _ExecVArgs, env: _ExecEnv) -> NoReturn: ...
 
-def _exit(n: int) -> NoReturn: ...
+def _exit(status: int) -> NoReturn: ...
 def kill(__pid: int, __signal: int) -> None: ...
 if sys.platform != 'win32':
     # Unix only
@@ -594,13 +594,13 @@ if sys.platform != 'win32':
 
 class _wrap_close(_TextIOWrapper):
     def close(self) -> Optional[int]: ...  # type: ignore
-def popen(command: str, mode: str = ..., buffering: int = ...) -> _wrap_close: ...
+def popen(cmd: str, mode: str = ..., buffering: int = ...) -> _wrap_close: ...
 
-def spawnl(mode: int, path: _PathType, arg0: Union[bytes, Text], *args: Union[bytes, Text]) -> int: ...
-def spawnle(mode: int, path: _PathType, arg0: Union[bytes, Text],
+def spawnl(mode: int, file: _PathType, arg0: Union[bytes, Text], *args: Union[bytes, Text]) -> int: ...
+def spawnle(mode: int, file: _PathType, arg0: Union[bytes, Text],
             *args: Any) -> int: ...  # Imprecise sig
-def spawnv(mode: int, path: _PathType, args: List[Union[bytes, Text]]) -> int: ...
-def spawnve(mode: int, path: _PathType, args: List[Union[bytes, Text]],
+def spawnv(mode: int, file: _PathType, args: List[Union[bytes, Text]]) -> int: ...
+def spawnve(mode: int, file: _PathType, args: List[Union[bytes, Text]],
             env: _ExecEnv) -> int: ...
 def system(command: _PathType) -> int: ...
 def times() -> times_result: ...