diff --git a/src/Elasticsearch/Connections/Connection.php b/src/Elasticsearch/Connections/Connection.php
index 72dfc345c..540bcfe15 100644
--- a/src/Elasticsearch/Connections/Connection.php
+++ b/src/Elasticsearch/Connections/Connection.php
@@ -374,6 +374,7 @@ public function logRequestSuccess(array $request, array $response): void
             array(
                 'method'    => $request['http_method'],
                 'uri'       => $response['effective_url'],
+                'port'      => $response['transfer_stats']['primary_port'],
                 'headers'   => $request['headers'],
                 'HTTP code' => $response['status'],
                 'duration'  => $response['transfer_stats']['total_time'],
@@ -408,11 +409,13 @@ public function logRequestSuccess(array $request, array $response): void
     public function logRequestFail(array $request, array $response, \Exception $exception): void
     {
         $this->log->debug('Request Body', array($request['body']));
+        
         $this->log->warning(
             'Request Failure:',
             array(
                 'method'    => $request['http_method'],
                 'uri'       => $response['effective_url'],
+                'port'      => $response['transfer_stats']['primary_port'],
                 'headers'   => $request['headers'],
                 'HTTP code' => $response['status'],
                 'duration'  => $response['transfer_stats']['total_time'],
diff --git a/tests/Elasticsearch/Tests/ClientBuilder/ArrayLogger.php b/tests/Elasticsearch/Tests/ClientBuilder/ArrayLogger.php
new file mode 100644
index 000000000..3a9010794
--- /dev/null
+++ b/tests/Elasticsearch/Tests/ClientBuilder/ArrayLogger.php
@@ -0,0 +1,57 @@
+<?php
+declare(strict_types = 1);
+
+namespace Elasticsearch\Tests\ClientBuilder;
+
+use Psr\Log\LoggerInterface;
+use Psr\Log\LogLevel;
+
+class ArrayLogger implements LoggerInterface
+{
+    public $output = [];
+
+    public function emergency($message, array $context = array())
+    {
+        $this->log(LogLevel::EMERGENCY, $message, $context);
+    }
+
+    public function alert($message, array $context = array())
+    {
+        $this->log(LogLevel::ALERT, $message, $context);
+    }
+
+    public function critical($message, array $context = array())
+    {
+        $this->log(LogLevel::CRITICAL, $message, $context);
+    }
+
+    public function error($message, array $context = array())
+    {
+        $this->log(LogLevel::ERROR, $message, $context);
+    }
+
+    public function warning($message, array $context = array())
+    {
+        $this->log(LogLevel::WARNING, $message, $context);
+    }
+
+    public function notice($message, array $context = array())
+    {
+        $this->log(LogLevel::NOTICE, $message, $context);
+    }
+
+    public function info($message, array $context = array())
+    {
+        $this->log(LogLevel::INFO, $message, $context);
+    }
+
+    public function debug($message, array $context = array())
+    {
+        $this->log(LogLevel::DEBUG, $message, $context);
+    }
+
+    public function log($level, $message, array $context = array())
+    {
+        $this->output[] = sprintf("%s: %s %s", $level, $message, json_encode($context));
+    }
+}
diff --git a/tests/Elasticsearch/Tests/ClientBuilder/DummyLogger.php b/tests/Elasticsearch/Tests/ClientBuilder/DummyLogger.php
index f5c536c77..6887853c2 100644
--- a/tests/Elasticsearch/Tests/ClientBuilder/DummyLogger.php
+++ b/tests/Elasticsearch/Tests/ClientBuilder/DummyLogger.php
@@ -5,5 +5,5 @@
 
 class DummyLogger
 {
-
+    
 }
diff --git a/tests/Elasticsearch/Tests/ClientIntegrationTests.php b/tests/Elasticsearch/Tests/ClientIntegrationTests.php
index 55bc3b456..cf36725fe 100644
--- a/tests/Elasticsearch/Tests/ClientIntegrationTests.php
+++ b/tests/Elasticsearch/Tests/ClientIntegrationTests.php
@@ -4,7 +4,10 @@
 
 namespace Elasticsearch\Tests;
 
-use Elasticsearch;
+use Elasticsearch\ClientBuilder;
+use Elasticsearch\Common\Exceptions\Missing404Exception;
+use Elasticsearch\Tests\ClientBuilder\ArrayLogger;
+use Psr\Log\LogLevel;
 
 /**
  * Class ClientTest
@@ -18,22 +21,62 @@
  */
 class ClientIntegrationTests extends \PHPUnit\Framework\TestCase
 {
-    public function testCustomQueryParams()
+    public function setUp()
     {
-        $client = Elasticsearch\ClientBuilder::create()
+        if (empty(getenv('ES_TEST_HOST'))) {
+            $this->markTestSkipped('I cannot execute integration test without ES_TEST_HOST env');
+        }
+        $this->logger = new ArrayLogger();
+    }
+
+    public function testLogRequestSuccessHasInfoNotEmpty()
+    {
+        $client = ClientBuilder::create()
+            ->setHosts([getenv('ES_TEST_HOST')])
+            ->setLogger($this->logger)
+            ->build();
+
+        $result = $client->info();
+
+        $this->assertNotEmpty($this->getLevelOutput(LogLevel::INFO, $this->logger->output));
+    }
+
+    public function testLogRequestSuccessHasPortInInfo()
+    {
+        $client = ClientBuilder::create()
             ->setHosts([getenv('ES_TEST_HOST')])
+            ->setLogger($this->logger)
             ->build();
 
-        $getParams = [
-            'index' => 'test',
-            'type' => 'test',
-            'id' => 1,
-            'parent' => 'abc',
-            'custom' => ['customToken' => 'abc', 'otherToken' => 123],
-            'client' => ['ignore' => 400]
-        ];
-        $exists = $client->exists($getParams);
-
-        $this->assertFalse((bool) $exists);
+        $result = $client->info();
+
+        $this->assertContains('"port"', $this->getLevelOutput(LogLevel::INFO, $this->logger->output));
+    }
+
+    public function testLogRequestFailHasWarning()
+    {
+        $client = ClientBuilder::create()
+            ->setHosts([getenv('ES_TEST_HOST')])
+            ->setLogger($this->logger)
+            ->build();
+
+        try {
+            $result = $client->get([
+                'index' => 'foo',
+                'id' => 'bar'
+            ]);
+        } catch (Missing404Exception $e) {
+            $this->assertNotEmpty($this->getLevelOutput(LogLevel::WARNING, $this->logger->output));
+        }
+    }
+
+    private function getLevelOutput(string $level, array $output): string
+    {
+        foreach ($output as $out) {
+            if (false !== strpos($out, $level)) {
+                return $out;
+            }
+        }
+        return '';
     }
 }