getMockBuilder(ExceptionHandler::class) ->getMock(); $app = $this->getApp(['make', 'instance', 'bind']); $this->setExpects($app, 'make', [ExceptionHandler::class], $exceptionHandler); $this->setExpects($app, 'instance', ['error.handler', $exceptionHandler]); $this->setExpects($app, 'bind', [Handler::class, 'error.handler']); $serviceProvider = new ExceptionsServiceProvider($app); $serviceProvider->register(); } }