diff --git a/Tests/Server/ConnectionTest.php b/Tests/Server/ConnectionTest.php
index dd895453..70629a22 100644
--- a/Tests/Server/ConnectionTest.php
+++ b/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