diff --git a/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php b/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
index 21902b5cf1aa..a67cb76bf11b 100644
--- a/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
@@ -72,7 +72,7 @@ public function testNoServer()
         $connection = new Connection(self::VAR_DUMPER_SERVER);
         $start = microtime(true);
         $this->assertFalse($connection->write($data));
-        $this->assertLessThan(1, microtime(true) - $start);
+        $this->assertLessThan(4, microtime(true) - $start);
     }
 
     private function getServerProcess(): Process
diff --git a/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php b/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
index 0547c752ac9d..20ac77ff3718 100644
--- a/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
+++ b/src/Symfony/Contracts/HttpClient/Test/HttpClientTestCase.php
@@ -669,7 +669,7 @@ public function testDestruct()
         $duration = microtime(true) - $start;
 
         $this->assertGreaterThan(1, $duration);
-        $this->assertLessThan(3, $duration);
+        $this->assertLessThan(4, $duration);
     }
 
     public function testProxy()