diff --git a/.github/workflows/codestyle.yml b/.github/workflows/codestyle.yml
index 579023f..4f19856 100644
--- a/.github/workflows/codestyle.yml
+++ b/.github/workflows/codestyle.yml
@@ -1,8 +1,6 @@
 name: codestyle
 on:
   pull_request:
-    paths:
-    - "!*.md"
   workflow_dispatch:
 jobs:
   code-coverage:
diff --git a/tests/RedisSequenceResolverTest.php b/tests/RedisSequenceResolverTest.php
index 1e7d75d..b58162f 100644
--- a/tests/RedisSequenceResolverTest.php
+++ b/tests/RedisSequenceResolverTest.php
@@ -13,6 +13,7 @@
 namespace Tests;
 
 use Godruoyi\Snowflake\RedisSequenceResolver;
+use Godruoyi\Snowflake\Snowflake;
 use RedisException;
 
 class RedisSequenceResolverTest extends TestCase
@@ -75,15 +76,19 @@ public function test_real_redis(): void
         $redis = new \Redis();
         $redis->connect($host, $port | 0);
 
+        // Sometimes running these tests in parallel on Github may cause unexpected errors,
+        // so we change to use random here.
+        $key = (new Snowflake())->getCurrentMillisecond();
+
         $redisResolver = new RedisSequenceResolver($redis);
 
-        $this->assertEquals(0, $redisResolver->sequence(1));
-        $this->assertEquals(1, $redisResolver->sequence(1));
-        $this->assertEquals(2, $redisResolver->sequence(1));
-        $this->assertEquals(3, $redisResolver->sequence(1));
+        $this->assertEquals(0, $redisResolver->sequence($key));
+        $this->assertEquals(1, $redisResolver->sequence($key));
+        $this->assertEquals(2, $redisResolver->sequence($key));
+        $this->assertEquals(3, $redisResolver->sequence($key));
 
         sleep(10);
 
-        $this->assertEquals(0, $redisResolver->sequence(1));
+        $this->assertEquals(0, $redisResolver->sequence($key));
     }
 }