diff --git a/src/Symfony/Component/HttpClient/Tests/DataCollector/HttpClientDataCollectorTest.php b/src/Symfony/Component/HttpClient/Tests/DataCollector/HttpClientDataCollectorTest.php
index 15a3136da6b7..54e160b5c524 100644
--- a/src/Symfony/Component/HttpClient/Tests/DataCollector/HttpClientDataCollectorTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/DataCollector/HttpClientDataCollectorTest.php
@@ -24,6 +24,11 @@ public static function setUpBeforeClass(): void
         TestHttpServer::start();
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop();
+    }
+
     public function testItCollectsRequestCount()
     {
         $httpClient1 = $this->httpClientThatHasTracedRequests([
diff --git a/src/Symfony/Component/HttpClient/Tests/HttplugClientTest.php b/src/Symfony/Component/HttpClient/Tests/HttplugClientTest.php
index 48dabb635ef2..0e62425b6b69 100644
--- a/src/Symfony/Component/HttpClient/Tests/HttplugClientTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/HttplugClientTest.php
@@ -32,6 +32,11 @@ public static function setUpBeforeClass(): void
         TestHttpServer::start();
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop();
+    }
+
     public function testSendRequest()
     {
         $client = new HttplugClient(new NativeHttpClient());
diff --git a/src/Symfony/Component/HttpClient/Tests/Psr18ClientTest.php b/src/Symfony/Component/HttpClient/Tests/Psr18ClientTest.php
index d4bae3ab5c4a..d1f4deb03a00 100644
--- a/src/Symfony/Component/HttpClient/Tests/Psr18ClientTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/Psr18ClientTest.php
@@ -28,6 +28,11 @@ public static function setUpBeforeClass(): void
         TestHttpServer::start();
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop();
+    }
+
     public function testSendRequest()
     {
         $factory = new Psr17Factory();
diff --git a/src/Symfony/Component/HttpClient/Tests/RetryableHttpClientTest.php b/src/Symfony/Component/HttpClient/Tests/RetryableHttpClientTest.php
index 9edf41318555..c15b0d2a4e0a 100644
--- a/src/Symfony/Component/HttpClient/Tests/RetryableHttpClientTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/RetryableHttpClientTest.php
@@ -27,6 +27,11 @@
 
 class RetryableHttpClientTest extends TestCase
 {
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop();
+    }
+
     public function testRetryOnError()
     {
         $client = new RetryableHttpClient(
diff --git a/src/Symfony/Component/HttpClient/Tests/TraceableHttpClientTest.php b/src/Symfony/Component/HttpClient/Tests/TraceableHttpClientTest.php
index 5f20e1989dfa..052400bb3cf9 100644
--- a/src/Symfony/Component/HttpClient/Tests/TraceableHttpClientTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/TraceableHttpClientTest.php
@@ -29,6 +29,11 @@ public static function setUpBeforeClass(): void
         TestHttpServer::start();
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop();
+    }
+
     public function testItTracesRequest()
     {
         $httpClient = $this->createMock(HttpClientInterface::class);
diff --git a/src/Symfony/Component/HttpClient/composer.json b/src/Symfony/Component/HttpClient/composer.json
index 735d69a3afd6..2326e9f4b758 100644
--- a/src/Symfony/Component/HttpClient/composer.json
+++ b/src/Symfony/Component/HttpClient/composer.json
@@ -25,7 +25,7 @@
         "php": ">=7.2.5",
         "psr/log": "^1|^2|^3",
         "symfony/deprecation-contracts": "^2.1|^3",
-        "symfony/http-client-contracts": "^2.4",
+        "symfony/http-client-contracts": "^2.6",
         "symfony/polyfill-php73": "^1.11",
         "symfony/polyfill-php80": "^1.16",
         "symfony/service-contracts": "^1.0|^2|^3"
diff --git a/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php b/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
index 78b02786a885..994e92621ff2 100644
--- a/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
+++ b/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
@@ -28,6 +28,12 @@ public static function setUpBeforeClass(): void
         TestHttpServer::start();
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        TestHttpServer::stop(8067);
+        TestHttpServer::stop(8077);
+    }
+
     abstract protected function getHttpClient(string $testCase): HttpClientInterface;
 
     public function testGetRequest()
diff --git a/src/Symfony/Contracts/HttpClient/Test/TestHttpServer.php b/src/Symfony/Contracts/HttpClient/Test/TestHttpServer.php
index 55a744aef433..463b4b75c60a 100644
--- a/src/Symfony/Contracts/HttpClient/Test/TestHttpServer.php
+++ b/src/Symfony/Contracts/HttpClient/Test/TestHttpServer.php
@@ -43,4 +43,11 @@ public static function start(int $port = 8057)
 
         return $process;
     }
+
+    public static function stop(int $port = 8057)
+    {
+        if (isset(self::$process[$port])) {
+            self::$process[$port]->stop();
+        }
+    }
 }
diff --git a/src/Symfony/Contracts/composer.json b/src/Symfony/Contracts/composer.json
index f70b8b7dc55a..151b85bda764 100644
--- a/src/Symfony/Contracts/composer.json
+++ b/src/Symfony/Contracts/composer.json
@@ -52,7 +52,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "2.5-dev"
+            "dev-main": "2.6-dev"
         }
     }
 }