diff --git a/installers/charm/pol/tests/test_charm.py b/installers/charm/pol/tests/test_charm.py
index 330ecee..6cf435d 100644
--- a/installers/charm/pol/tests/test_charm.py
+++ b/installers/charm/pol/tests/test_charm.py
@@ -132,7 +132,7 @@
         kafka_relation_id = self.harness.add_relation("kafka", "kafka")
         self.harness.add_relation_unit(kafka_relation_id, "kafka/0")
         self.harness.update_relation_data(
-            kafka_relation_id, "kafka/0", {"host": "kafka", "port": 9092}
+            kafka_relation_id, "kafka", {"host": "kafka", "port": 9092}
         )
 
     def initialize_mongo_config(self):