diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d967cd5..bdcabf2 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,12 +1,20 @@
-name: Test
+name: Lint
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+      - develop
+  pull_request:
+    branches:
+      - master
+      - develop
 
 permissions:
   contents: read
 
 jobs:
-  test:
+  lint:
     runs-on: ubuntu-latest
 
     steps:
@@ -22,7 +30,7 @@ jobs:
         run: poetry install --no-interaction --no-root
       - name: Install Project
         run: poetry install --no-interaction
-      - name: Poetry Build
+      - name: Ruff Lint Format
         run: poetry run ruff format --check
         id: format
       - name: Ruff Lint Check
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e03be65..a716e87 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,6 +1,14 @@
 name: Test
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+      - develop
+  pull_request:
+    branches:
+      - master
+      - develop
 
 permissions:
   contents: read
@@ -10,6 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     strategy:
+      fail-fast: false
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 72c661c..d29890d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -13,6 +13,8 @@ build:
     # nodejs: "20"
     # rust: "1.70"
     # golang: "1.20"
+  apt_packages:
+    - graphviz
   jobs:
     post_create_environment:
       # Install poetry
diff --git a/tests/tree/test_save.py b/tests/tree/test_save.py
index 1d78ae0..9716358 100644
--- a/tests/tree/test_save.py
+++ b/tests/tree/test_save.py
@@ -57,6 +57,7 @@ def test_page_to_dict(self, tree, tmp_path):
                     2009, 12, 17, 12, 4, 56, tzinfo=tzoffset(None, 7200)
                 ),
                 "change_frequency": "monthly",
+                "images": None,
                 "news_story": None,
             },
             {
@@ -66,6 +67,7 @@ def test_page_to_dict(self, tree, tmp_path):
                     2009, 12, 17, 12, 4, 56, tzinfo=tzoffset(None, 7200)
                 ),
                 "change_frequency": "always",
+                "images": None,
                 "news_story": None,
             },
             {
@@ -73,6 +75,7 @@ def test_page_to_dict(self, tree, tmp_path):
                 "priority": Decimal("0.5"),
                 "last_modified": None,
                 "change_frequency": None,
+                "images": None,
                 "news_story": {
                     "title": "Foo <foo>",
                     "publish_date": datetime.datetime(
@@ -91,6 +94,7 @@ def test_page_to_dict(self, tree, tmp_path):
                 "priority": Decimal("0.5"),
                 "last_modified": None,
                 "change_frequency": None,
+                "images": None,
                 "news_story": {
                     "title": "Bar & bar",
                     "publish_date": datetime.datetime(
@@ -109,6 +113,7 @@ def test_page_to_dict(self, tree, tmp_path):
                 "priority": Decimal("0.5"),
                 "last_modified": None,
                 "change_frequency": None,
+                "images": None,
                 "news_story": {
                     "title": "Bar & bar",
                     "publish_date": datetime.datetime(
@@ -127,6 +132,7 @@ def test_page_to_dict(self, tree, tmp_path):
                 "priority": Decimal("0.5"),
                 "last_modified": None,
                 "change_frequency": None,
+                "images": None,
                 "news_story": {
                     "title": "Bąž",
                     "publish_date": datetime.datetime(
diff --git a/usp/fetch_parse.py b/usp/fetch_parse.py
index ae995e4..e960d0e 100644
--- a/usp/fetch_parse.py
+++ b/usp/fetch_parse.py
@@ -608,6 +608,7 @@ class PagesXMLSitemapParser(AbstractXMLSitemapParser):
 
     class Image:
         """Data class for holding image data while parsing."""
+
         __slots__ = ["loc", "caption", "geo_location", "title", "license"]
 
         def __init__(self):
diff --git a/usp/objects/sitemap.py b/usp/objects/sitemap.py
index 9cdad94..38933b9 100644
--- a/usp/objects/sitemap.py
+++ b/usp/objects/sitemap.py
@@ -9,16 +9,17 @@
 """
 
 import abc
-from functools import cache
+from functools import lru_cache
 import os
 import pickle
 import tempfile
-from typing import List, Iterator
+from typing import List, Iterator, Tuple
 
 from .page import SitemapPage
 
 
-@cache
+# TODO: change to functools.cache when dropping py3.8
+@lru_cache(maxsize=None)
 def _all_slots(target_cls):
     mro = target_cls.__mro__
 
@@ -248,7 +249,7 @@ def __eq__(self, other) -> bool:
     def __repr__(self):
         return f"{self.__class__.__name__}(url={self.url}, pages={self.pages})"
 
-    def __getstate__(self) -> tuple[None, dict]:
+    def __getstate__(self) -> Tuple[None, dict]:
         # Load slots of this class and its parents (mangling if appropriate)
         obj_slots = {slot: getattr(self, slot) for slot in _all_slots(self.__class__)}
         # Replace temp file path with actual content
diff --git a/usp/web_client/requests_client.py b/usp/web_client/requests_client.py
index c27f58d..0719afb 100644
--- a/usp/web_client/requests_client.py
+++ b/usp/web_client/requests_client.py
@@ -43,7 +43,7 @@ def status_code(self) -> int:
     def status_message(self) -> str:
         message = self.__requests_response.reason
         if not message:
-            message = HTTPStatus(self.status_code(), None).phrase
+            message = HTTPStatus(self.status_code()).phrase
         return message
 
     def header(self, case_insensitive_name: str) -> Optional[str]: