diff --git a/pulsar-broker/src/test/java/org/apache/pulsar/client/api/UnloadSubscriptionTest.java b/pulsar-broker/src/test/java/org/apache/pulsar/client/api/UnloadSubscriptionTest.java
index 93d5bf30ec6b1..22f7a5d6a43e4 100644
--- a/pulsar-broker/src/test/java/org/apache/pulsar/client/api/UnloadSubscriptionTest.java
+++ b/pulsar-broker/src/test/java/org/apache/pulsar/client/api/UnloadSubscriptionTest.java
@@ -60,6 +60,7 @@ protected void doInitConf() throws Exception {
         super.doInitConf();
         conf.setSystemTopicEnabled(false);
         conf.setTransactionCoordinatorEnabled(false);
+        conf.setAcknowledgmentAtBatchIndexLevelEnabled(true);
     }
 
     @AfterClass(alwaysRun = true)
@@ -242,6 +243,7 @@ private Consumer<String> createConsumer(String topicName, String subName, Subscr
                 .subscriptionName(subName)
                 .subscriptionType(subType)
                 .isAckReceiptEnabled(true)
+                .enableBatchIndexAcknowledgment(true)
                 .subscribe();
         return consumer;
     }