diff --git a/solr/core/src/test/org/apache/solr/metrics/reporters/SolrJmxReporterCloudTest.java b/solr/core/src/test/org/apache/solr/metrics/reporters/SolrJmxReporterCloudTest.java
index b94ff8a7808..3da4b1446b6 100644
--- a/solr/core/src/test/org/apache/solr/metrics/reporters/SolrJmxReporterCloudTest.java
+++ b/solr/core/src/test/org/apache/solr/metrics/reporters/SolrJmxReporterCloudTest.java
@@ -35,6 +35,7 @@ import org.apache.solr.common.params.CommonParams;
 import org.apache.solr.metrics.SolrMetricManager;
 import org.apache.solr.metrics.SolrMetricReporter;
 import org.apache.solr.metrics.reporters.jmx.JmxMetricsReporter;
+import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -60,9 +61,13 @@ public class SolrJmxReporterCloudTest extends SolrCloudTestCase {
         .setMaxShardsPerNode(2)
         .process(cluster.getSolrClient());
   }
+  @AfterClass
+  public static void releaseMBeanServer() {
+    mBeanServer = null;
+  }
+  
 
   @Test
-  //Commented 14-Oct-2018 @LuceneTestCase.BadApple(bugUrl="https://issues.apache.org/jira/browse/SOLR-12028") // 2-Aug-2018
   public void testJmxReporter() throws Exception {
     CollectionAdminRequest.reloadCollection(COLLECTION).processAndWait(cluster.getSolrClient(), 60);
     CloudSolrClient solrClient = cluster.getSolrClient();