diff --git a/stdlib/3/io.pyi b/stdlib/3/io.pyi
index ba0a80a38..c9060b043 100644
--- a/stdlib/3/io.pyi
+++ b/stdlib/3/io.pyi
@@ -141,7 +141,9 @@ class TextIOBase(IOBase):
     def __next__(self) -> str: ...  # type: ignore
     def detach(self) -> IOBase: ...
     def write(self, s: str) -> int: ...
+    def writelines(self, lines: List[str]) -> None: ...  # type: ignore
     def readline(self, size: int = ...) -> str: ...  # type: ignore
+    def readlines(self, hint: int = ...) -> List[str]: ...  # type: ignore
     def read(self, size: Optional[int] = ...) -> str: ...
     def seek(self, offset: int, whence: int = ...) -> int: ...
     def tell(self) -> int: ...