diff --git a/CHANGELOG-2.0.md b/CHANGELOG-2.0.md
index 7a764b2c4..10fd289e4 100644
--- a/CHANGELOG-2.0.md
+++ b/CHANGELOG-2.0.md
@@ -2,7 +2,7 @@
 
 ## Fixed
 
-- [#2634](https://github.com/hyperf/hyperf/pull/2634) Fixed bug that `RedisSecondMetaGenerator` will generate the same meta.
+- [#2634](https://github.com/hyperf/hyperf/pull/2634) [#2640](https://github.com/hyperf/hyperf/pull/2640) Fixed bug that `RedisSecondMetaGenerator` will generate the same meta.
 - [#2639](https://github.com/hyperf/hyperf/pull/2639) Fixed exception will not be normalized for json-rpc.
 
 # v2.0.14 - 2020-10-12
diff --git a/bin/co-phpunit b/bin/co-phpunit
index 4b1e9bfd6..b22aa5794 100755
--- a/bin/co-phpunit
+++ b/bin/co-phpunit
@@ -2,9 +2,12 @@
 <?php
 
 $code = 0;
-Swoole\Coroutine::set(['exit_condition' => function(){
-    return Swoole\Coroutine::stats()['coroutine_num'] === 0;
-}]);
+Swoole\Coroutine::set([
+    'hook_flags' => SWOOLE_HOOK_ALL,
+    'exit_condition' => function(){
+        return Swoole\Coroutine::stats()['coroutine_num'] === 0;
+    }
+]);
 Swoole\Coroutine\Run(function () use (&$code) {
     if (version_compare('7.1.0', PHP_VERSION, '>')) {
         fwrite(
diff --git a/src/snowflake/src/MetaGenerator.php b/src/snowflake/src/MetaGenerator.php
index e7c781231..937bc930f 100644
--- a/src/snowflake/src/MetaGenerator.php
+++ b/src/snowflake/src/MetaGenerator.php
@@ -42,14 +42,14 @@ abstract class MetaGenerator implements MetaGeneratorInterface
             if ($this->sequence == 0) {
                 $timestamp = $this->getNextTimestamp();
             }
+        } elseif ($timestamp < $this->lastTimestamp) {
+            $this->clockMovedBackwards($timestamp, $this->lastTimestamp);
+            $this->sequence = ($this->sequence + 1) % $this->configuration->maxSequence();
+            $timestamp = $this->lastTimestamp;
         } else {
             $this->sequence = 0;
         }
 
-        if ($timestamp < $this->lastTimestamp) {
-            $this->clockMovedBackwards($timestamp, $this->lastTimestamp);
-        }
-
         if ($timestamp < $this->beginTimestamp) {
             throw new SnowflakeException(sprintf('The beginTimestamp %d is invalid, because it smaller than timestamp %d.', $this->beginTimestamp, $timestamp));
         }
diff --git a/src/snowflake/src/MetaGenerator/RedisSecondMetaGenerator.php b/src/snowflake/src/MetaGenerator/RedisSecondMetaGenerator.php
index 283bea80c..795d35541 100644
--- a/src/snowflake/src/MetaGenerator/RedisSecondMetaGenerator.php
+++ b/src/snowflake/src/MetaGenerator/RedisSecondMetaGenerator.php
@@ -28,12 +28,11 @@ class RedisSecondMetaGenerator extends RedisMetaGenerator
 
     public function getNextTimestamp(): int
     {
-        $timestamp = $this->getTimestamp();
-        while ($timestamp <= $this->lastTimestamp) {
-            usleep(1000);
-            $timestamp = $this->getTimestamp();
-        }
+        return $this->lastTimestamp + 1;
+    }
 
-        return $timestamp;
+    protected function clockMovedBackwards($timestamp, $lastTimestamp)
+    {
+        // Don't throw exception
     }
 }
diff --git a/src/snowflake/tests/RedisMetaGeneratorTest.php b/src/snowflake/tests/RedisMetaGeneratorTest.php
index aae07825f..f07d19165 100644
--- a/src/snowflake/tests/RedisMetaGeneratorTest.php
+++ b/src/snowflake/tests/RedisMetaGeneratorTest.php
@@ -137,7 +137,7 @@ class RedisMetaGeneratorTest extends TestCase
         $this->assertSame($meta->getWorkerId(), $userId % 31);
     }
 
-    public function testGetNextTimestamp()
+    public function testRedisSecondNextTimestamp()
     {
         $container = $this->getContainer();
         $hConfig = $container->get(ConfigInterface::class);
@@ -147,7 +147,43 @@ class RedisMetaGeneratorTest extends TestCase
         $time = $metaGenerator->getTimestamp();
         $nextTime = $metaGenerator->getNextTimestamp();
         $this->assertSame($time + 1, $nextTime);
-        $this->assertSame(time(), $nextTime);
+    }
+
+    public function testGenerateSameMetaForRedisSecond()
+    {
+        $container = $this->getContainer();
+        $hConfig = $container->get(ConfigInterface::class);
+        $config = new SnowflakeConfig();
+        $metaGenerator = new RedisSecondMetaGenerator($config, MetaGeneratorInterface::DEFAULT_BEGIN_SECOND, $hConfig);
+        $generator = new SnowflakeIdGenerator($metaGenerator);
+        $result = [];
+        $channel = new Channel(2);
+        go(function () use (&$result, $generator, $channel) {
+            try {
+                for ($i = 0; $i < 4100; ++$i) {
+                    $result[] = $generator->generate();
+                }
+            } catch (\Throwable $exception) {
+            } finally {
+                $channel->push(true);
+            }
+        });
+
+        go(function () use (&$result, $generator, $channel) {
+            try {
+                for ($i = 0; $i < 900; ++$i) {
+                    $result[] = $generator->generate();
+                }
+            } catch (\Throwable $exception) {
+            } finally {
+                $channel->push(true);
+            }
+        });
+
+        $channel->pop(5);
+        $channel->pop(5);
+
+        $this->assertSame(5000, count(array_unique($result)));
     }
 
     protected function getContainer()
@@ -184,6 +220,8 @@ class RedisMetaGeneratorTest extends TestCase
         ]);
 
         $container = Mockery::mock(Container::class);
+        ApplicationContext::setContainer($container);
+
         $container->shouldReceive('get')->with(ConfigInterface::class)->andReturn($config);
         $container->shouldReceive('make')->with(Channel::class, Mockery::any())->andReturnUsing(function ($class, $args) {
             return new Channel($args['size']);
@@ -200,7 +238,6 @@ class RedisMetaGeneratorTest extends TestCase
             return new RedisProxy($factory, $args['pool']);
         });
 
-        ApplicationContext::setContainer($container);
         return $container;
     }
 }