diff --git a/src/django_docutils/lib/metadata/extract.py b/src/django_docutils/lib/metadata/extract.py
index 40dce804..08174cc6 100644
--- a/src/django_docutils/lib/metadata/extract.py
+++ b/src/django_docutils/lib/metadata/extract.py
@@ -54,6 +54,7 @@ def extract_metadata(document: nodes.document) -> dict[str, str]:
                 continue
 
             if element.tagname == "field":  # custom fields (e.g. summary)
+                assert len(element.children) == 2
                 name_elem, body_elem = element.children
                 assert isinstance(name_elem, (nodes.Text, nodes.Element))
                 assert isinstance(body_elem, (nodes.Text, nodes.Element))
diff --git a/src/django_docutils/lib/publisher.py b/src/django_docutils/lib/publisher.py
index 6ab89226..bee1dca9 100644
--- a/src/django_docutils/lib/publisher.py
+++ b/src/django_docutils/lib/publisher.py
@@ -33,7 +33,7 @@ def publish_parts_from_doctree(
     enable_exit_status: bool = False,
 ) -> dict[str, str]:
     """Render docutils doctree into docutils parts."""
-    reader = Reader(parser_name="null")
+    reader = Reader(parser_name="null")  # type:ignore
     pub = Publisher(
         reader,
         None,
@@ -45,9 +45,9 @@ def publish_parts_from_doctree(
     if not writer and writer_name:
         pub.set_writer(writer_name)
     pub.process_programmatic_settings(
-        settings_spec,  # type:ignore
+        settings_spec,
         settings_overrides,
-        config_section,  # type:ignore
+        config_section,
     )
     pub.set_destination(None, destination_path)
     pub.publish(enable_exit_status=enable_exit_status)
@@ -121,7 +121,7 @@ def publish_doctree(
     register_django_docutils_directives()
     register_django_docutils_roles()
 
-    return docutils_publish_doctree(
+    return docutils_publish_doctree(  # type:ignore
         source=force_bytes(source),
         settings_overrides=settings_overrides,
     )
diff --git a/src/django_docutils/lib/roles/common.py b/src/django_docutils/lib/roles/common.py
index 8822a7b8..a9572359 100644
--- a/src/django_docutils/lib/roles/common.py
+++ b/src/django_docutils/lib/roles/common.py
@@ -130,7 +130,7 @@ def url_handler(target):
     if not has_explicit_title:
         title = utils.unescape(remote_title)
 
-    sn = innernodeclass(title, title)
+    sn = innernodeclass(title)
     rn = nodes.reference("", "", internal=True, refuri=url, classes=[name])
     rn += sn
     return [rn], []