diff --git a/server/src/main/java/org/opensearch/snapshots/SnapshotsService.java b/server/src/main/java/org/opensearch/snapshots/SnapshotsService.java
index 232dbe946d2ae..7dae6fe2044d6 100644
--- a/server/src/main/java/org/opensearch/snapshots/SnapshotsService.java
+++ b/server/src/main/java/org/opensearch/snapshots/SnapshotsService.java
@@ -216,7 +216,7 @@ public class SnapshotsService extends AbstractLifecycleComponent implements Clus
         Setting.Property.Dynamic
     );
 
-    private static final String SNAPSHOT_PINNED_TIMESTAMP_DELIMITER = ":";
+    private static final String SNAPSHOT_PINNED_TIMESTAMP_DELIMITER = "__";
     private volatile int maxConcurrentOperations;
 
     public SnapshotsService(
diff --git a/test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java b/test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java
index 2bf610974767b..f277c118c3d46 100644
--- a/test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java
+++ b/test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java
@@ -2886,7 +2886,7 @@ private static Settings buildRemoteStoreNodeAttributes(
         }
         settings.put(RemoteStoreSettings.CLUSTER_REMOTE_STORE_PATH_TYPE_SETTING.getKey(), randomFrom(PathType.values()));
         settings.put(RemoteStoreSettings.CLUSTER_REMOTE_STORE_TRANSLOG_METADATA.getKey(), randomBoolean());
-        settings.put(RemoteStoreSettings.CLUSTER_REMOTE_STORE_PINNED_TIMESTAMP_ENABLED.getKey(), false);
+        settings.put(RemoteStoreSettings.CLUSTER_REMOTE_STORE_PINNED_TIMESTAMP_ENABLED.getKey(), randomBoolean());
         return settings.build();
     }