diff --git a/src/idom/backend/flask.py b/src/idom/backend/flask.py
index 5f4f34b05..95c054b83 100644
--- a/src/idom/backend/flask.py
+++ b/src/idom/backend/flask.py
@@ -27,7 +27,6 @@
 import idom
 from idom.backend._common import (
     ASSETS_PATH,
-    CLIENT_BUILD_DIR,
     MODULES_PATH,
     PATH_PREFIX,
     STREAM_PATH,
@@ -139,7 +138,7 @@ def use_connection() -> Connection[_FlaskCarrier]:
 
 @dataclass
 class Options(CommonOptions):
-    """Render server config for :class:`FlaskRenderServer`"""
+    """Render server config for :func:`idom.backend.flask.configure`"""
 
     cors: bool | dict[str, Any] = False
     """Enable or configure Cross Origin Resource Sharing (CORS)
diff --git a/src/idom/backend/sanic.py b/src/idom/backend/sanic.py
index 6b506841b..fda9d214f 100644
--- a/src/idom/backend/sanic.py
+++ b/src/idom/backend/sanic.py
@@ -4,7 +4,7 @@
 import json
 import logging
 from dataclasses import dataclass
-from typing import Any, Dict, MutableMapping, Tuple, Union
+from typing import Any, MutableMapping, Tuple
 from urllib import parse as urllib_parse
 from uuid import uuid4
 
@@ -23,11 +23,9 @@
     serve_json_patch,
 )
 from idom.core.types import RootComponentConstructor
-from idom.utils import vdom_to_html
 
 from ._common import (
     ASSETS_PATH,
-    CLIENT_BUILD_DIR,
     MODULES_PATH,
     PATH_PREFIX,
     STREAM_PATH,
@@ -97,7 +95,7 @@ def use_connection() -> Connection[_SanicCarrier]:
 
 @dataclass
 class Options(CommonOptions):
-    """Options for :class:`SanicRenderServer`"""
+    """Render server config for :func:`idom.backend.sanic.configure`"""
 
     cors: bool | dict[str, Any] = False
     """Enable or configure Cross Origin Resource Sharing (CORS)
diff --git a/src/idom/backend/starlette.py b/src/idom/backend/starlette.py
index 8f84e8ee2..21d5200af 100644
--- a/src/idom/backend/starlette.py
+++ b/src/idom/backend/starlette.py
@@ -93,7 +93,7 @@ def use_connection() -> Connection[WebSocket]:
 
 @dataclass
 class Options(CommonOptions):
-    """Optionsuration options for :class:`StarletteRenderServer`"""
+    """Render server config for :func:`idom.backend.starlette.configure`"""
 
     cors: bool | dict[str, Any] = False
     """Enable or configure Cross Origin Resource Sharing (CORS)
diff --git a/src/idom/backend/tornado.py b/src/idom/backend/tornado.py
index 5ea95d9b7..6145a9f9c 100644
--- a/src/idom/backend/tornado.py
+++ b/src/idom/backend/tornado.py
@@ -4,7 +4,6 @@
 import json
 from asyncio import Queue as AsyncQueue
 from asyncio.futures import Future
-from dataclasses import dataclass
 from typing import Any, List, Tuple, Type, Union
 from urllib.parse import urljoin
 
@@ -35,6 +34,7 @@
 
 
 Options = CommonOptions
+"""Render server config for :func:`idom.backend.tornado.configure`"""
 
 
 def configure(
diff --git a/src/idom/utils.py b/src/idom/utils.py
index bc9c97587..13b3579d9 100644
--- a/src/idom/utils.py
+++ b/src/idom/utils.py
@@ -87,7 +87,7 @@ def vdom_to_html(value: str | VdomDict, indent: int = 0, depth: int = 0) -> str:
 
     if "attributes" in value:
         if not tag:  # pragma: no cover
-            warn(f"Ignored attributes from element frament", UserWarning)
+            warn("Ignored attributes from element frament", UserWarning)
         else:
             vdom_attributes = dict(value["attributes"])
             if "style" in vdom_attributes: