diff --git a/src/dispatch/plugins/dispatch_slack/plugin.py b/src/dispatch/plugins/dispatch_slack/plugin.py
index 0bba3c227c62..64db7928faff 100644
--- a/src/dispatch/plugins/dispatch_slack/plugin.py
+++ b/src/dispatch/plugins/dispatch_slack/plugin.py
@@ -433,7 +433,9 @@ def fetch_events(
             plugin_event = plugin_service.get_plugin_event_by_id(
                 db_session=db_session, plugin_event_id=plugin_event_id
             )
-            return self.get_event(plugin_event).fetch_activity(client, subject, oldest=oldest)
+            return self.get_event(plugin_event).fetch_activity(
+                client=client, subject=subject, oldest=oldest
+            )
         except Exception as e:
             logger.exception(e)
             raise e