diff --git a/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/multicast/MulticastZenPingTests.java b/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/multicast/MulticastZenPingTests.java
index 5730c72ae61..f8df3bd110b 100644
--- a/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/multicast/MulticastZenPingTests.java
+++ b/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/multicast/MulticastZenPingTests.java
@@ -33,6 +33,7 @@ import org.elasticsearch.discovery.zen.DiscoveryNodesProvider;
 import org.elasticsearch.discovery.zen.ping.ZenPing;
 import org.elasticsearch.discovery.zen.ping.multicast.MulticastZenPing;
 import org.elasticsearch.node.service.NodeService;
+import org.elasticsearch.test.integration.ElasticsearchTestCase;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 import org.elasticsearch.transport.local.LocalTransport;
@@ -42,17 +43,25 @@ import java.net.DatagramPacket;
 import java.net.InetAddress;
 import java.net.MulticastSocket;
 
-import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 
 /**
  *
  */
-public class MulticastZenPingTests {
+public class MulticastZenPingTests extends ElasticsearchTestCase {
+
+    private Settings buildRandomMulticast(Settings settings) {
+        ImmutableSettings.Builder builder = ImmutableSettings.builder().put(settings);
+        builder.put("discovery.zen.ping.multicast.group", "224.2.3." + randomIntBetween(0, 255));
+        builder.put("discovery.zen.ping.multicast.port", randomIntBetween(55000, 56000));
+        return builder.build();
+    }
 
     @Test
     public void testSimplePings() {
         Settings settings = ImmutableSettings.EMPTY;
+        settings = buildRandomMulticast(settings);
+
         ThreadPool threadPool = new ThreadPool();
         ClusterName clusterName = new ClusterName("test");
         final TransportService transportServiceA = new TransportService(new LocalTransport(settings, threadPool, Version.CURRENT), threadPool).start();
@@ -105,6 +114,8 @@ public class MulticastZenPingTests {
     @Test
     public void testExternalPing() throws Exception {
         Settings settings = ImmutableSettings.EMPTY;
+        settings = buildRandomMulticast(settings);
+
         ThreadPool threadPool = new ThreadPool();
         ClusterName clusterName = new ClusterName("test");
         final TransportService transportServiceA = new TransportService(new LocalTransport(settings, threadPool, Version.CURRENT), threadPool).start();
diff --git a/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/unicast/UnicastZenPingTests.java b/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/unicast/UnicastZenPingTests.java
index aad5df948ed..89a1cbeb1a4 100644
--- a/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/unicast/UnicastZenPingTests.java
+++ b/src/test/java/org/elasticsearch/test/unit/discovery/zen/ping/unicast/UnicastZenPingTests.java
@@ -32,22 +32,26 @@ import org.elasticsearch.discovery.zen.DiscoveryNodesProvider;
 import org.elasticsearch.discovery.zen.ping.ZenPing;
 import org.elasticsearch.discovery.zen.ping.unicast.UnicastZenPing;
 import org.elasticsearch.node.service.NodeService;
+import org.elasticsearch.test.integration.ElasticsearchTestCase;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 import org.elasticsearch.transport.netty.NettyTransport;
 import org.junit.Test;
 
-import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 
 /**
  *
  */
-public class UnicastZenPingTests {
+public class UnicastZenPingTests extends ElasticsearchTestCase {
 
     @Test
     public void testSimplePings() {
         Settings settings = ImmutableSettings.EMPTY;
+        int startPort = 11000 + randomIntBetween(0, 1000);
+        int endPort = startPort + 10;
+        settings = ImmutableSettings.builder().put(settings).put("transport.tcp.port", startPort + "-" + endPort).build();
+
         ThreadPool threadPool = new ThreadPool();
         ClusterName clusterName = new ClusterName("test");
         NetworkService networkService = new NetworkService(settings);
diff --git a/src/test/java/org/elasticsearch/test/unit/transport/AbstractSimpleTransportTests.java b/src/test/java/org/elasticsearch/test/unit/transport/AbstractSimpleTransportTests.java
index 21ab9899e31..e6dfd1944b8 100644
--- a/src/test/java/org/elasticsearch/test/unit/transport/AbstractSimpleTransportTests.java
+++ b/src/test/java/org/elasticsearch/test/unit/transport/AbstractSimpleTransportTests.java
@@ -27,6 +27,7 @@ import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.settings.ImmutableSettings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.test.integration.ElasticsearchTestCase;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.*;
 import org.junit.After;
@@ -38,13 +39,12 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
 import static org.elasticsearch.transport.TransportRequestOptions.options;
-import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.*;
 
 /**
  *
  */
-public abstract class AbstractSimpleTransportTests {
+public abstract class AbstractSimpleTransportTests extends ElasticsearchTestCase {
 
     protected ThreadPool threadPool;
 
diff --git a/src/test/java/org/elasticsearch/test/unit/transport/netty/SimpleNettyTransportTests.java b/src/test/java/org/elasticsearch/test/unit/transport/netty/SimpleNettyTransportTests.java
index 4c44fa0e4cb..670afd363cb 100644
--- a/src/test/java/org/elasticsearch/test/unit/transport/netty/SimpleNettyTransportTests.java
+++ b/src/test/java/org/elasticsearch/test/unit/transport/netty/SimpleNettyTransportTests.java
@@ -22,6 +22,7 @@ package org.elasticsearch.test.unit.transport.netty;
 import org.elasticsearch.Version;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.network.NetworkService;
+import org.elasticsearch.common.settings.ImmutableSettings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.transport.InetSocketTransportAddress;
 import org.elasticsearch.test.unit.transport.AbstractSimpleTransportTests;
@@ -34,6 +35,9 @@ public class SimpleNettyTransportTests extends AbstractSimpleTransportTests {
 
     @Override
     protected TransportService build(Settings settings, Version version) {
+        int startPort = 11000 + randomIntBetween(0, 255);
+        int endPort = startPort + 10;
+        settings = ImmutableSettings.builder().put(settings).put("transport.tcp.port", startPort + "-" + endPort).build();
         return new TransportService(settings, new NettyTransport(settings, threadPool, new NetworkService(settings), version), threadPool).start();
     }