magento/magento2#: “Bad request” is never shown

Author: atwixfirster

app/code/Magento/Customer/Test/Unit/Controller/Account/ConfirmTest.php

@@ -203,7 +203,7 @@ public function testNoCustomerIdInRequest($customerId, $key)
             ->with($this->equalTo('key'), false)
             ->will($this->returnValue($key));
 
-        $this->messageManager->expects($this->once())
+        $this->messageManagerMock->expects($this->once())
             ->method('addErrorMessage')
             ->with(__('Bad request.'));