diff --git a/src/main/java/io/vertx/redis/client/impl/RedisClusterConnection.java b/src/main/java/io/vertx/redis/client/impl/RedisClusterConnection.java
index 23c5cfa9..a099bc40 100644
--- a/src/main/java/io/vertx/redis/client/impl/RedisClusterConnection.java
+++ b/src/main/java/io/vertx/redis/client/impl/RedisClusterConnection.java
@@ -141,7 +141,7 @@ public Future<Response> send(Request request) {
         // can run anywhere
         if (REDUCERS.containsKey(cmd)) {
           sendToAllSlots(promise, req, cmd, args, forceMasterEndpoint, REDUCERS.get(cmd));
-        } else if(cmd.equals(SCRIPT) && Arrays.equals(args.get(0), "LOAD".getBytes())) {
+        } else if(cmd.equals(SCRIPT) && "LOAD".equalsIgnoreCase(new String(args.get(0)))) {
           sendToAllSlots(promise, req, cmd, args, forceMasterEndpoint, responses -> {
             // all nodes should compute the same sha
             assert responses.stream().map(Response::toString).collect(Collectors.toSet()).size() == 1;
diff --git a/src/test/java/io/vertx/redis/client/test/RedisClusterTest.java b/src/test/java/io/vertx/redis/client/test/RedisClusterTest.java
index e6e6f231..045efbe3 100644
--- a/src/test/java/io/vertx/redis/client/test/RedisClusterTest.java
+++ b/src/test/java/io/vertx/redis/client/test/RedisClusterTest.java
@@ -14,6 +14,7 @@
 import org.junit.runner.RunWith;
 import org.testcontainers.containers.FixedHostPortGenericContainer;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.containers.wait.strategy.Wait;
 
 import java.util.*;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -26,25 +27,28 @@
 public class RedisClusterTest {
 
   @ClassRule
-  public static final GenericContainer<?> redis = new FixedHostPortGenericContainer<>("grokzen/redis-cluster:6.2.0")
+  public static final GenericContainer<?> redis = new FixedHostPortGenericContainer<>("grokzen/redis-cluster:6.2.11")
+    .withAccessToHost(true)
     .withEnv("IP", "0.0.0.0")
     .withEnv("STANDALONE", "true")
     .withEnv("SENTINEL", "true")
-    .withExposedPorts(7000, 7001, 7002, 7003, 7004, 7005, 7006, 7007, 5000, 5001, 5002)
-    // cluster ports (7000-7005) 6x (master+replica) 3 nodes
-    .withFixedExposedPort(7000, 7000)
-    .withFixedExposedPort(7001, 7001)
-    .withFixedExposedPort(7002, 7002)
-    .withFixedExposedPort(7003, 7003)
-    .withFixedExposedPort(7004, 7004)
-    .withFixedExposedPort(7005, 7005)
-    // standalone ports (7006-7007) 2x
-    .withFixedExposedPort(7006, 7006)
-    .withFixedExposedPort(7007, 7007)
+    .withEnv("INITIAL_PORT", "48000")
+    .waitingFor(Wait.forLogMessage(".*Cluster state changed: ok\\n", 3))
+    .withExposedPorts(48000, 48001, 48002, 48003, 48004, 48005, 48006, 48007, 55465, 55466, 55467)
+    // cluster ports (48000-48005) 6x (master+replica) 3 nodes
+    .withFixedExposedPort(48000, 48000)
+    .withFixedExposedPort(48001, 48001)
+    .withFixedExposedPort(48002, 48002)
+    .withFixedExposedPort(48003, 48003)
+    .withFixedExposedPort(48004, 48004)
+    .withFixedExposedPort(48005, 48005)
+    // standalone ports (48006-48007) 2x
+    .withFixedExposedPort(48006, 48006)
+    .withFixedExposedPort(48007, 48007)
     // sentinel ports (5000-5002) 3x (match the cluster master nodes)
-    .withFixedExposedPort(5000, 5000)
-    .withFixedExposedPort(5001, 5001)
-    .withFixedExposedPort(5002, 5002);
+    .withFixedExposedPort(55465, 55465)
+    .withFixedExposedPort(55466, 55466)
+    .withFixedExposedPort(55467, 55467);
 
 
   @Rule
@@ -56,12 +60,12 @@ public class RedisClusterTest {
     .setUseReplicas(RedisReplicas.SHARE)
     // we will flood the redis server
     .setMaxWaitingHandlers(128 * 1024)
-    .addConnectionString("redis://127.0.0.1:7000")
-    .addConnectionString("redis://127.0.0.1:7001")
-    .addConnectionString("redis://127.0.0.1:7002")
-    .addConnectionString("redis://127.0.0.1:7003")
-    .addConnectionString("redis://127.0.0.1:7004")
-    .addConnectionString("redis://127.0.0.1:7005")
+    .addConnectionString("redis://127.0.0.1:48000")
+    .addConnectionString("redis://127.0.0.1:48001")
+    .addConnectionString("redis://127.0.0.1:48002")
+    .addConnectionString("redis://127.0.0.1:48003")
+    .addConnectionString("redis://127.0.0.1:48004")
+    .addConnectionString("redis://127.0.0.1:48005")
     .setMaxPoolSize(8)
     .setMaxPoolWaiting(16)
     .setHashSlotCacheTTL(10_000);
@@ -1244,7 +1248,7 @@ public void testScriptLoadRunsOnEveryMaster(TestContext should) {
       cluster.exceptionHandler(should::fail);
       Future<@Nullable Response> setFuture1 = cluster.send(cmd(SET).arg(key1).arg(argv1));
       Future<@Nullable Response> setFuture2 = cluster.send(cmd(SET).arg(key2).arg(argv2));
-      Future<@Nullable Response> scriptLoadFuture = cluster.send(cmd(SCRIPT).arg("LOAD").arg(script));
+      Future<@Nullable Response> scriptLoadFuture = cluster.send(cmd(SCRIPT).arg("load").arg(script));
 
       return Future.all(setFuture1, setFuture2, scriptLoadFuture)
         .compose(compositeRet -> {