diff --git a/test/framework/src/main/java/org/elasticsearch/test/InternalTestCluster.java b/test/framework/src/main/java/org/elasticsearch/test/InternalTestCluster.java
index de4226bf2755b..c8d380cf09511 100644
--- a/test/framework/src/main/java/org/elasticsearch/test/InternalTestCluster.java
+++ b/test/framework/src/main/java/org/elasticsearch/test/InternalTestCluster.java
@@ -1562,6 +1562,7 @@ private synchronized void startAndPublishNodesAndClients(List<NodeAndClient> nod
                 // if we're adding too many master-eligible nodes at once, we can't update the min master setting before adding the nodes.
                 updateMinMasterNodes(currentMasters + newMasters);
             }
+            rebuildUnicastHostFiles(nodeAndClients); // ensure that new nodes can find the existing nodes when they start
             List<Future<?>> futures = nodeAndClients.stream().map(node -> executor.submit(node::startNode)).collect(Collectors.toList());
 
             try {
diff --git a/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/NetworkDisruptionIT.java b/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/NetworkDisruptionIT.java
index beaf8a45c1572..67138cde5bd85 100644
--- a/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/NetworkDisruptionIT.java
+++ b/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/NetworkDisruptionIT.java
@@ -25,7 +25,6 @@
 import org.elasticsearch.xpack.core.ml.job.persistence.AnomalyDetectorsIndex;
 import org.elasticsearch.xpack.core.ml.job.process.autodetect.state.Quantiles;
 import org.elasticsearch.xpack.ml.support.BaseMlIntegTestCase;
-import org.elasticsearch.test.junit.annotations.TestLogging;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -54,7 +53,6 @@ protected Collection<Class<? extends Plugin>> nodePlugins() {
         return plugins;
     }
 
-    @TestLogging("org.elasticsearch.discovery.zen:TRACE")
     public void testJobRelocation() throws Exception {
         internalCluster().ensureAtLeastNumDataNodes(5);
         ensureStableCluster(5);