correccion

tests/WebTestCaseBase.php

@@ -102,9 +102,7 @@ class WebTestCaseBase extends WebTestCase
                     null, //$original->getSecurityTokenStorage(),
                     null, //$original->getHttpClient(),
                     $webServiceData);
-		    static::$kernel->setKernelModifier(function($kernel) use ($fake) {
-			    $kernel->getContainer()->set('webService', $fake);
-		    });
+		static::$kernel->getContainer()->set('webService', $fake);
             }
         }
     }