.url(endpointUrl)
        .head()
        .build()

    client.newCall(request).execute().use {
      assertEquals(204, it.code)
    }
  }

  @Test
  fun staleConnectionNotReusedForNonIdempotentRequest() {
    // Capture the connection so that we can later make it stale.
    var connection: RealConnection? = null
    client =
      client.newBuilder()
        .addNetworkInterceptor(