// Play it back.
    val connection = connect(peer)
    connection.newStream(headerEntries("b", "banana"), false)
    assertThat(connection.openStreamCount()).isEqualTo(1)
    connection.writePingAndAwaitPong() // Ensure that the SYN_REPLY has been received.
    assertThat(connection.openStreamCount()).isEqualTo(0)

    // Verify the peer received what was expected.
    val synStream = peer.takeFrame()