diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientLastAccessTimeTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientLastAccessTimeTest.java
index 1abe697b973..b36945b205b 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientLastAccessTimeTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientLastAccessTimeTest.java
@@ -44,7 +44,7 @@ public class ClientLastAccessTimeTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientModifyMaxInactiveIntervalTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientModifyMaxInactiveIntervalTest.java
index d438dc2f9e7..df120b05f5d 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientModifyMaxInactiveIntervalTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientModifyMaxInactiveIntervalTest.java
@@ -48,7 +48,7 @@ public class ClientModifyMaxInactiveIntervalTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientNonClusteredSessionScavengingTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientNonClusteredSessionScavengingTest.java
index 4bf51699292..d555a941662 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientNonClusteredSessionScavengingTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientNonClusteredSessionScavengingTest.java
@@ -71,7 +71,7 @@ public class ClientNonClusteredSessionScavengingTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientOrphanedSessionTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientOrphanedSessionTest.java
index 5250dd68c9d..4b2ddba9ca2 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientOrphanedSessionTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientOrphanedSessionTest.java
@@ -45,7 +45,7 @@ public class ClientOrphanedSessionTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionExpiryTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionExpiryTest.java
index 160ce45a046..63e5ee28e5d 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionExpiryTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionExpiryTest.java
@@ -45,7 +45,7 @@ public class ClientSessionExpiryTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionInvalidateCreateScavengeTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionInvalidateCreateScavengeTest.java
index 371389498b5..402246b8e5e 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionInvalidateCreateScavengeTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionInvalidateCreateScavengeTest.java
@@ -44,7 +44,7 @@ public class ClientSessionInvalidateCreateScavengeTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionMigrationTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionMigrationTest.java
index 284a6a8d9ce..24da1e67372 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionMigrationTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionMigrationTest.java
@@ -47,7 +47,7 @@ public class ClientSessionMigrationTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }
diff --git a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionScavengingTest.java b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionScavengingTest.java
index fe5959c9356..42f808f9603 100644
--- a/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionScavengingTest.java
+++ b/tests/test-sessions/test-hazelcast-sessions/src/test/java/org/eclipse/jetty/hazelcast/session/client/ClientSessionScavengingTest.java
@@ -45,7 +45,7 @@ public class ClientSessionScavengingTest
         throws Exception
     {
         Config config = new Config().addMapConfig( new MapConfig().setName( MAP_NAME ) ) //
-            .setInstanceName( "beer" );
+            .setInstanceName( Long.toString( System.currentTimeMillis() ) );
         // start Hazelcast instance
         hazelcastInstance = Hazelcast.getOrCreateHazelcastInstance( config );
     }