diff --git a/server/src/test/java/org/opensearch/cluster/routing/allocation/allocator/TimeBoundBalancedShardsAllocatorTests.java b/server/src/test/java/org/opensearch/cluster/routing/allocation/allocator/TimeBoundBalancedShardsAllocatorTests.java
index c6705a678e077..8899b4ee8f68d 100644
--- a/server/src/test/java/org/opensearch/cluster/routing/allocation/allocator/TimeBoundBalancedShardsAllocatorTests.java
+++ b/server/src/test/java/org/opensearch/cluster/routing/allocation/allocator/TimeBoundBalancedShardsAllocatorTests.java
@@ -46,6 +46,7 @@
 import static org.opensearch.cluster.routing.ShardRoutingState.INITIALIZING;
 import static org.opensearch.cluster.routing.ShardRoutingState.STARTED;
 import static org.opensearch.cluster.routing.allocation.allocator.BalancedShardsAllocator.ALLOCATOR_TIMEOUT_SETTING;
+import static org.opensearch.cluster.routing.allocation.allocator.BalancedShardsAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING;
 
 public class TimeBoundBalancedShardsAllocatorTests extends OpenSearchAllocationTestCase {
 
@@ -604,6 +605,32 @@ public void testAllocatorTimeout() {
         assertEquals(-1, ALLOCATOR_TIMEOUT_SETTING.get(build).getMillis());
     }
 
+    public void testFollowupPriorityValues() {
+        String settingKey = "cluster.routing.allocation.balanced_shards_allocator.schedule_reroute.priority";
+        Settings build = Settings.builder().put(settingKey, "normal").build();
+        assertEquals(Priority.NORMAL, FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        build = Settings.builder().put(settingKey, "high").build();
+        assertEquals(Priority.HIGH, FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        build = Settings.builder().put(settingKey, "urgent").build();
+        assertEquals(Priority.URGENT, FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        Settings wrongPriority = Settings.builder().put(settingKey, "immediate").build();
+        IllegalArgumentException iae = expectThrows(
+            IllegalArgumentException.class,
+            () -> FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(wrongPriority)
+        );
+        assertEquals("priority [IMMEDIATE] not supported for [" + FOLLOW_UP_REROUTE_PRIORITY_SETTING.getKey() + "]", iae.getMessage());
+
+        Settings wrongPriority2 = Settings.builder().put(settingKey, "random").build();
+        IllegalArgumentException iae2 = expectThrows(
+            IllegalArgumentException.class,
+            () -> FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(wrongPriority2)
+        );
+        assertEquals("No enum constant org.opensearch.common.Priority.RANDOM", iae2.getMessage());
+    }
+
     private RoutingTable buildRoutingTable(Metadata metadata) {
         RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
         for (Map.Entry<String, IndexMetadata> entry : metadata.getIndices().entrySet()) {
diff --git a/server/src/test/java/org/opensearch/gateway/GatewayAllocatorTests.java b/server/src/test/java/org/opensearch/gateway/GatewayAllocatorTests.java
index be2486846d401..7a3b5f576449c 100644
--- a/server/src/test/java/org/opensearch/gateway/GatewayAllocatorTests.java
+++ b/server/src/test/java/org/opensearch/gateway/GatewayAllocatorTests.java
@@ -540,6 +540,35 @@ public void testCollectTimedOutShardsAndScheduleReroute_Failure() throws Interru
         clusterService.close();
     }
 
+    public void testFollowupPriorityValues() {
+        String settingKey = "cluster.routing.allocation.shards_batch_gateway_allocator.schedule_reroute.priority";
+        Settings build = Settings.builder().put(settingKey, "normal").build();
+        assertEquals(Priority.NORMAL, ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        build = Settings.builder().put(settingKey, "high").build();
+        assertEquals(Priority.HIGH, ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        build = Settings.builder().put(settingKey, "urgent").build();
+        assertEquals(Priority.URGENT, ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(build));
+
+        Settings wrongPriority = Settings.builder().put(settingKey, "immediate").build();
+        IllegalArgumentException iae = expectThrows(
+            IllegalArgumentException.class,
+            () -> ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(wrongPriority)
+        );
+        assertEquals(
+            "priority [IMMEDIATE] not supported for [" + ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.getKey() + "]",
+            iae.getMessage()
+        );
+
+        Settings wrongPriority2 = Settings.builder().put(settingKey, "random").build();
+        IllegalArgumentException iae2 = expectThrows(
+            IllegalArgumentException.class,
+            () -> ShardsBatchGatewayAllocator.FOLLOW_UP_REROUTE_PRIORITY_SETTING.get(wrongPriority2)
+        );
+        assertEquals("No enum constant org.opensearch.common.Priority.RANDOM", iae2.getMessage());
+    }
+
     private void createIndexAndUpdateClusterState(int count, int numberOfShards, int numberOfReplicas) {
         if (count == 0) return;
         Metadata.Builder metadata = Metadata.builder();