diff --git a/src/test/java/org/redisson/BaseConcurrentTest.java b/src/test/java/org/redisson/BaseConcurrentTest.java
index 1f142fec5..c863fb523 100644
--- a/src/test/java/org/redisson/BaseConcurrentTest.java
+++ b/src/test/java/org/redisson/BaseConcurrentTest.java
@@ -4,50 +4,50 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.ForkJoinPool;
 import java.util.concurrent.TimeUnit;
-import java.util.stream.IntStream;
 
 import org.junit.Assert;
-import org.redisson.client.RedisClient;
 
 public abstract class BaseConcurrentTest extends BaseTest {
 
     protected void testMultiInstanceConcurrency(int iterations, final RedissonRunnable runnable) throws InterruptedException {
-        System.out.println("Multi Instance Concurrent Job Interation: " + iterations);
-        ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors() * 2);
-        final Map<Integer, RedissonClient> instances = new HashMap<>();
+        ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()*2);
 
-        pool.submit(() -> {
-            IntStream.range(0, iterations)
-                    .parallel()
-                    .forEach((i) -> instances.put(i, BaseTest.createInstance()));
-        });
+        final Map<Integer, RedissonClient> instances = new HashMap<Integer, RedissonClient>();
+        for (int i = 0; i < iterations; i++) {
+            instances.put(i, BaseTest.createInstance());
+        }
 
         long watch = System.currentTimeMillis();
-        pool.awaitQuiescence(5, TimeUnit.MINUTES);
-
-        pool.submit(() -> {
-            IntStream.range(0, iterations)
-                    .parallel()
-                    .forEach((i) -> runnable.run(instances.get(i)));
-        });
+        for (int i = 0; i < iterations; i++) {
+            final int n = i;
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    RedissonClient redisson = instances.get(n);
+                    runnable.run(redisson);
+                }
+            });
+        }
 
-        pool.shutdown();
-        Assert.assertTrue(pool.awaitTermination(RedissonRuntimeEnvironment.isTravis ? 10 : 3, TimeUnit.MINUTES));
+        executor.shutdown();
+        Assert.assertTrue(executor.awaitTermination(RedissonRuntimeEnvironment.isTravis ? 10 : 3, TimeUnit.MINUTES));
 
         System.out.println("multi: " + (System.currentTimeMillis() - watch));
 
-        pool = new ForkJoinPool();
+        executor = Executors.newCachedThreadPool();
 
-        pool.submit(() -> {
-            instances.values()
-                    .parallelStream()
-                    .<RedisClient>forEach((r) -> r.shutdown());
-        });
+        for (final RedissonClient redisson : instances.values()) {
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    redisson.shutdown();
+                }
+            });
+        }
 
-        pool.shutdown();
-        Assert.assertTrue(pool.awaitTermination(5, TimeUnit.MINUTES));
+        executor.shutdown();
+        Assert.assertTrue(executor.awaitTermination(5, TimeUnit.MINUTES));
     }
 
     protected void testMultiInstanceConcurrencySequentiallyLaunched(int iterations, final RedissonRunnable runnable) throws InterruptedException {
@@ -85,7 +85,6 @@ public abstract class BaseConcurrentTest extends BaseTest {
         final RedissonClient r = BaseTest.createInstance();
         long watch = System.currentTimeMillis();
 
-//        ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors() * 2);
         ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() * 2);
 
         for (int i = 0; i < iterations; i++) {
@@ -93,13 +92,6 @@ public abstract class BaseConcurrentTest extends BaseTest {
                 runnable.run(r);
             });
         }
-//        pool.submit(() -> {
-//            IntStream.range(0, iterations)
-//                    .parallel()
-//                    .forEach((i) -> {
-//                        runnable.run(r);
-//                    });
-//        });
 
         pool.shutdown();
         Assert.assertTrue(pool.awaitTermination(RedissonRuntimeEnvironment.isTravis ? 10 : 3, TimeUnit.MINUTES));