diff --git a/core/src/test/java/org/elasticsearch/test/InternalTestCluster.java b/core/src/test/java/org/elasticsearch/test/InternalTestCluster.java
index c6334f66d21..ac785c1601d 100644
--- a/core/src/test/java/org/elasticsearch/test/InternalTestCluster.java
+++ b/core/src/test/java/org/elasticsearch/test/InternalTestCluster.java
@@ -164,8 +164,13 @@ public final class InternalTestCluster extends TestCluster {
      */
     public static final String SETTING_CLUSTER_NODE_SEED = "test.cluster.node.seed";
 
+    /**
+     * The number of ports in the range used for this JVM
+     */
+    public static final int PORTS_PER_JVM = 100;
+
     private static final int JVM_ORDINAL = Integer.parseInt(System.getProperty(SysGlobals.CHILDVM_SYSPROP_JVM_ID, "0"));
-    public static final int BASE_PORT = 9300 + 100 * (JVM_ORDINAL + 1);
+    public static final int BASE_PORT = 9300 + PORTS_PER_JVM * (JVM_ORDINAL + 1);
 
     private static final boolean ENABLE_MOCK_MODULES = RandomizedTest.systemPropertyAsBoolean(TESTS_ENABLE_MOCK_MODULES, true);
 
diff --git a/core/src/test/java/org/elasticsearch/test/discovery/ClusterDiscoveryConfiguration.java b/core/src/test/java/org/elasticsearch/test/discovery/ClusterDiscoveryConfiguration.java
index 6b63243b546..f3c0da986e2 100644
--- a/core/src/test/java/org/elasticsearch/test/discovery/ClusterDiscoveryConfiguration.java
+++ b/core/src/test/java/org/elasticsearch/test/discovery/ClusterDiscoveryConfiguration.java
@@ -142,11 +142,11 @@ public class ClusterDiscoveryConfiguration extends SettingsSource {
             int[] unicastHostPorts = new int[numHosts];
 
             final int basePort = calcBasePort();
-            final int maxPort = basePort + 1000;
+            final int maxPort = basePort + InternalTestCluster.PORTS_PER_JVM;
             int tries = 0;
             for (int i = 0; i < unicastHostPorts.length; i++) {
                 boolean foundPortInRange = false;
-                while (tries < 1000 && !foundPortInRange) {
+                while (tries < InternalTestCluster.PORTS_PER_JVM && !foundPortInRange) {
                     try (ServerSocket serverSocket = new ServerSocket()) {
                         // Set SO_REUSEADDR as we may bind here and not be able to reuse the address immediately without it.
                         serverSocket.setReuseAddress(NetworkUtils.defaultReuseAddress());