diff --git a/data-prepper-core/src/integrationTest/java/org/opensearch/dataprepper/plugins/InMemorySource.java b/data-prepper-core/src/integrationTest/java/org/opensearch/dataprepper/plugins/InMemorySource.java
index 3060dbeb25..826a4ff1e8 100644
--- a/data-prepper-core/src/integrationTest/java/org/opensearch/dataprepper/plugins/InMemorySource.java
+++ b/data-prepper-core/src/integrationTest/java/org/opensearch/dataprepper/plugins/InMemorySource.java
@@ -26,7 +26,7 @@
  */
 @DataPrepperPlugin(name = "in_memory", pluginType = Source.class, pluginConfigurationType = InMemoryConfig.class)
 public class InMemorySource implements Source<Record<Event>> {
-    public static final Duration ACK_EXPIRY_TIME = Duration.ofSeconds(35);
+    public static final Duration ACK_EXPIRY_TIME = Duration.ofSeconds(60);
     private static final Logger LOG = LoggerFactory.getLogger(InMemorySource.class);
 
     private final String testingKey;