diff --git a/dlt/sources/helpers/rest_client/auth.py b/dlt/sources/helpers/rest_client/auth.py
index 020c63a195..37c0de3db1 100644
--- a/dlt/sources/helpers/rest_client/auth.py
+++ b/dlt/sources/helpers/rest_client/auth.py
@@ -38,11 +38,7 @@ class AuthConfigBase(AuthBase, CredentialsConfiguration):
     configurable via env variables or toml files
     """
 
-    def __bool__(self) -> bool:
-        # This is needed to avoid AuthConfigBase-derived classes
-        # which do not implement CredentialsConfiguration interface
-        # to be evaluated as False in requests.sessions.Session.prepare_request()
-        return True
+    pass
 
 
 @configspec
diff --git a/docs/website/docs/general-usage/http/rest-client.md b/docs/website/docs/general-usage/http/rest-client.md
index 1093428b0f..19cc95bf78 100644
--- a/docs/website/docs/general-usage/http/rest-client.md
+++ b/docs/website/docs/general-usage/http/rest-client.md
@@ -407,7 +407,7 @@ The available authentication methods are defined in the `dlt.sources.helpers.res
 - [APIKeyAuth](#api-key-authentication)
 - [HttpBasicAuth](#http-basic-authentication)
 
-For specific use cases, you can [implement custom authentication](#implementing-custom-authentication) by subclassing the `AuthBase` class from the Requests library.
+For specific use cases, you can [implement custom authentication](#implementing-custom-authentication) by subclassing the `AuthConfigBase` class.
 
 ### Bearer token authentication
 
@@ -479,12 +479,12 @@ response = client.get("/protected/resource")
 
 ### Implementing custom authentication
 
-You can implement custom authentication by subclassing the `AuthBase` class and implementing the `__call__` method:
+You can implement custom authentication by subclassing the `AuthConfigBase` class and implementing the `__call__` method:
 
 ```py
-from requests.auth import AuthBase
+from dlt.sources.helpers.rest_client.auth import AuthConfigBase
 
-class CustomAuth(AuthBase):
+class CustomAuth(AuthConfigBase):
     def __init__(self, token):
         self.token = token
 
diff --git a/tests/sources/helpers/rest_client/test_client.py b/tests/sources/helpers/rest_client/test_client.py
index e03879b417..50defa8edb 100644
--- a/tests/sources/helpers/rest_client/test_client.py
+++ b/tests/sources/helpers/rest_client/test_client.py
@@ -1,7 +1,6 @@
 import os
 import pytest
 from typing import Any, cast
-from requests.auth import AuthBase
 from dlt.common.typing import TSecretStrValue
 from dlt.sources.helpers.requests import Response, Request
 from dlt.sources.helpers.rest_client import RESTClient
@@ -58,6 +57,7 @@ def test_page_context(self, rest_client: RESTClient) -> None:
         for page in rest_client.paginate(
             "/posts",
             paginator=JSONResponsePaginator(next_url_path="next_page"),
+            auth=AuthConfigBase(),
         ):
             # response that produced data
             assert isinstance(page.response, Response)
@@ -183,44 +183,3 @@ def test_oauth_jwt_auth_success(self, rest_client: RESTClient):
         )
 
         assert_pagination(list(pages_iter))
-
-    def test_custom_auth_success(self, rest_client: RESTClient):
-        class CustomAuthConfigBase(AuthConfigBase):
-            def __init__(self, token: str):
-                self.token = token
-
-            def __call__(self, request: Request) -> Request:
-                request.headers["Authorization"] = f"Bearer {self.token}"
-                return request
-
-        class CustomAuthAuthBase(AuthBase):
-            def __init__(self, token: str):
-                self.token = token
-
-            def __call__(self, request: Request) -> Request:
-                request.headers["Authorization"] = f"Bearer {self.token}"
-                return request
-
-        auth_list = [
-            CustomAuthConfigBase("test-token"),
-            CustomAuthAuthBase("test-token"),
-        ]
-
-        for auth in auth_list:
-            response = rest_client.get(
-                "/protected/posts/bearer-token",
-                auth=auth,
-            )
-
-            assert response.status_code == 200
-            assert response.json()["data"][0] == {"id": 0, "title": "Post 0"}
-
-            pages_iter = rest_client.paginate(
-                "/protected/posts/bearer-token",
-                auth=auth,
-            )
-
-            pages_list = list(pages_iter)
-            assert_pagination(pages_list)
-
-            assert pages_list[0].response.request.headers["Authorization"] == "Bearer test-token"