diff --git a/solr/core/src/test/org/apache/solr/cloud/MigrateRouteKeyTest.java b/solr/core/src/test/org/apache/solr/cloud/MigrateRouteKeyTest.java
index 58c956b6ad0..78f82ed9efb 100644
--- a/solr/core/src/test/org/apache/solr/cloud/MigrateRouteKeyTest.java
+++ b/solr/core/src/test/org/apache/solr/cloud/MigrateRouteKeyTest.java
@@ -21,6 +21,7 @@ import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
+import org.apache.lucene.util.LuceneTestCase;
 import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.impl.CloudSolrClient;
@@ -39,6 +40,7 @@ import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@LuceneTestCase.Slow
 public class MigrateRouteKeyTest extends SolrCloudTestCase {
 
   @BeforeClass