diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d2afdfd3..a3173b81 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,12 +5,14 @@ on:
     branches:
       - main
       - develop
+      - "[0-9]+.[0-9]+.x"
     tags:
       - "[0-9]+.[0-9]+.[0-9]+"
   pull_request:
     branches:
       - main
       - develop
+      - "[0-9]+.[0-9]+.x"
   merge_group:
 
 concurrency:
diff --git a/src/codemodder/codemods/api.py b/src/codemodder/codemods/api.py
index f09910ea..c375dc41 100644
--- a/src/codemodder/codemods/api.py
+++ b/src/codemodder/codemods/api.py
@@ -8,6 +8,7 @@
     Metadata,
     Reference,
     ReviewGuidance,
+    ToolMetadata,
 )
 from codemodder.codemods.libcst_transformer import (
     LibcstResultTransformer,
diff --git a/src/codemodder/codemods/base_codemod.py b/src/codemodder/codemods/base_codemod.py
index 57f057f3..b3229ca9 100644
--- a/src/codemodder/codemods/base_codemod.py
+++ b/src/codemodder/codemods/base_codemod.py
@@ -41,7 +41,7 @@ class ToolMetadata:
     name: str
     rule_id: str
     rule_name: str
-    rule_url: str
+    rule_url: str | None = None
 
 
 class BaseCodemod(metaclass=ABCMeta):