diff --git a/tests/integrational/AddChannelChannelGroupEndpointTest.php b/tests/integrational/AddChannelChannelGroupEndpointTest.php
index c57d9560..6a4d0998 100644
--- a/tests/integrational/AddChannelChannelGroupEndpointTest.php
+++ b/tests/integrational/AddChannelChannelGroupEndpointTest.php
@@ -51,6 +51,7 @@ public function testGroupMissing()
         $addChannelChannelGroup->channels(["c|h1", "ch2s"])->sync();
     }
 
+    // my comment
     public function testGroupIsEmpty()
     {
         $this->expectException(PubNubValidationException::class);
diff --git a/tests/integrational/PublishTest.php b/tests/integrational/PublishTest.php
index 61fba0df..3b689955 100644
--- a/tests/integrational/PublishTest.php
+++ b/tests/integrational/PublishTest.php
@@ -12,6 +12,8 @@
 
 class PublishTest extends \PubNubTestCase
 {
+    private const PUBLISH_DELAY_MILLISECONDS = 1000;
+
     /**
      * @param Publish $publish
      */
@@ -29,10 +31,19 @@ private function assertSuccess($publish)
 
         $this->assertEquals($result->getTimetoken(), $envelope->getResult()->getTimetoken());
 
+        $this->delayBetweenPublishes();
+
         $publish->clear();
 
         $result2 = $publish->sync();
         $this->assertNotEquals($result->getTimetoken(), $result2->getTimetoken());
+
+        $this->delayBetweenPublishes();
+    }
+
+    private function delayBetweenPublishes(): void
+    {
+        usleep(self::PUBLISH_DELAY_MILLISECONDS * 1000);
     }
 
     /**