diff --git a/datasette/templates/debug_actions.html b/datasette/templates/debug_actions.html
index 6dd5ac0e..0ef7b329 100644
--- a/datasette/templates/debug_actions.html
+++ b/datasette/templates/debug_actions.html
@@ -31,7 +31,7 @@
       <td><strong>{{ action.name }}</strong></td>
       <td>{% if action.abbr %}<code>{{ action.abbr }}</code>{% endif %}</td>
       <td>{{ action.description or "" }}</td>
-      <td><code>{{ action.resource_class }}</code></td>
+      <td>{% if action.resource_class %}<code>{{ action.resource_class }}</code>{% endif %}</td>
       <td>{% if action.takes_parent %}✓{% endif %}</td>
       <td>{% if action.takes_child %}✓{% endif %}</td>
       <td>{% if action.also_requires %}<code>{{ action.also_requires }}</code>{% endif %}</td>
diff --git a/tests/test_html.py b/tests/test_html.py
index 35b839ec..7b667301 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -1194,6 +1194,21 @@ async def test_actions_page(ds_client):
         ds_client.ds.root_enabled = original_root_enabled
 
 
+@pytest.mark.asyncio
+async def test_actions_page_does_not_display_none_string(ds_client):
+    """Ensure the Resource column doesn't display the string 'None' for null values."""
+    # https://github.com/simonw/datasette/issues/2599
+    original_root_enabled = ds_client.ds.root_enabled
+    try:
+        ds_client.ds.root_enabled = True
+        cookies = {"ds_actor": ds_client.actor_cookie({"id": "root"})}
+        response = await ds_client.get("/-/actions", cookies=cookies)
+        assert response.status_code == 200
+        assert "<code>None</code>" not in response.text
+    finally:
+        ds_client.ds.root_enabled = original_root_enabled
+
+
 @pytest.mark.asyncio
 async def test_permission_debug_tabs_with_query_string(ds_client):
     """Test that navigation tabs persist query strings across Check, Allowed, and Rules pages"""