diff --git a/third_party/2and3/requests/auth.pyi b/third_party/2and3/requests/auth.pyi
index b73aa7047ce1..09a6df76be19 100644
--- a/third_party/2and3/requests/auth.pyi
+++ b/third_party/2and3/requests/auth.pyi
@@ -3,6 +3,7 @@
 from typing import Any, Text, Union
 from . import compat
 from . import cookies
+from . import models
 from . import utils
 from . import status_codes
 
@@ -17,7 +18,7 @@ CONTENT_TYPE_MULTI_PART = ...  # type: Any
 def _basic_auth_str(username: Union[bytes, Text], password: Union[bytes, Text]) -> str: ...
 
 class AuthBase:
-    def __call__(self, r): ...
+    def __call__(self, r: models.Request) -> models.Request: ...
 
 class HTTPBasicAuth(AuthBase):
     username = ...  # type: Any
diff --git a/third_party/2and3/requests/sessions.pyi b/third_party/2and3/requests/sessions.pyi
index 9f5c0d8b4001..b2be8440bc56 100644
--- a/third_party/2and3/requests/sessions.pyi
+++ b/third_party/2and3/requests/sessions.pyi
@@ -2,7 +2,7 @@
 
 from typing import Any, Union, MutableMapping, Text, Optional, IO, Tuple, Callable
 from . import adapters
-from . import auth
+from . import auth as _auth
 from . import compat
 from . import cookies
 from . import models
@@ -61,12 +61,12 @@ _Hooks = MutableMapping[Text, Callable[[Response], Any]]
 class Session(SessionRedirectMixin):
     __attrs__ = ...  # type: Any
     headers = ...  # type: MutableMapping[Text, Text]
-    auth = ...  # type: Union[None, Tuple[Text, Text], Callable[[Request], Request]]
+    auth = ...  # type: Union[None, Tuple[Text, Text], _auth.AuthBase, Callable[[Request], Request]]
     proxies = ...  # type: MutableMapping[Text, Text]
     hooks = ...  # type: _Hooks
     params = ...  # type: Union[bytes, MutableMapping[Text, Text]]
     stream = ...  # type: bool
-    verify = ...  # type: bool
+    verify = ...  # type: Union[None, bool, Text]
     cert = ...  # type: Union[None, Text, Tuple[Text, Text]]
     max_redirects = ...  # type: int
     trust_env = ...  # type: bool
@@ -83,13 +83,13 @@ class Session(SessionRedirectMixin):
                 headers: Optional[MutableMapping[Text, Text]] = ...,
                 cookies: Union[None, RequestsCookieJar, MutableMapping[Text, Text]] = ...,
                 files: Optional[MutableMapping[Text, IO]] = ...,
-                auth: Union[None, Tuple[Text, Text], Callable[[Request], Request]] = ...,
+                auth: Union[None, Tuple[Text, Text], _auth.AuthBase, Callable[[Request], Request]] = ...,
                 timeout: Union[None, float, Tuple[float, float]] = ...,
                 allow_redirects: Optional[bool] = ...,
                 proxies: Optional[MutableMapping[Text, Text]] = ...,
                 hooks: Optional[_Hooks] = ...,
                 stream: Optional[bool] = ...,
-                verify: Optional[bool] = ...,
+                verify: Union[None, bool, Text] = ...,
                 cert: Union[Text, Tuple[Text, Text], None] = ...,
                 json: Optional[MutableMapping] = ...,
                 ) -> Response: ...