public function testOmitsReasonPhraseFromStatusLineIfEmpty()
{
$response = (new Response())->withStatus(299)->withAddedHeader('X-Foo-Bar', 'Baz');
$response->getBody()->write('Content!');
$message = Serializer::toString($response);
$this->assertContains("HTTP/1.1 299\r\n", $message);
}