diff --git a/stdlib/subprocess.pyi b/stdlib/subprocess.pyi
index 817baebc7..3a0361ca0 100644
--- a/stdlib/subprocess.pyi
+++ b/stdlib/subprocess.pyi
@@ -423,7 +423,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: Optional[str] = ...,
         text: Literal[True],
@@ -448,7 +448,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: str,
         errors: Optional[str] = ...,
         text: Optional[bool] = ...,
@@ -473,7 +473,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: str,
         text: Optional[bool] = ...,
@@ -499,7 +499,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         # where the real keyword only ones start
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: Optional[str] = ...,
         text: Optional[bool] = ...,
@@ -524,7 +524,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: None = ...,
         errors: None = ...,
         text: Literal[None, False] = ...,
@@ -549,7 +549,7 @@ if sys.version_info >= (3, 7):
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: Optional[str] = ...,
         text: Optional[bool] = ...,
@@ -576,7 +576,7 @@ else:
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: str,
         errors: Optional[str] = ...,
     ) -> str: ...
@@ -600,7 +600,7 @@ else:
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: str,
     ) -> str: ...
@@ -624,7 +624,7 @@ else:
         *,
         universal_newlines: Literal[True],
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: Optional[str] = ...,
     ) -> str: ...
@@ -648,7 +648,7 @@ else:
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: None = ...,
         errors: None = ...,
     ) -> bytes: ...
@@ -672,7 +672,7 @@ else:
         pass_fds: Any = ...,
         *,
         timeout: Optional[float] = ...,
-        input: _TXT = ...,
+        input: Optional[_TXT] = ...,
         encoding: Optional[str] = ...,
         errors: Optional[str] = ...,
     ) -> Any: ...  # morally: -> _TXT