client.newBuilder()
        .fastFallback(false)
        .apply {
          retryOnConnectionFailure = false
        }
        .build()

    executeSynchronously(request)
      .assertFailureMatches("stream was reset: REFUSED_STREAM")

    assertThat(client.routeDatabase.failedRoutes).isEmpty()
    assertThat(server1.requestCount).isEqualTo(1)
    assertThat(server2.requestCount).isEqualTo(0)

    }

  fun assertFailure(vararg messages: String) =
    apply {
      assertThat(failure, "No failure found").isNotNull()
      assertThat(messages).contains(failure!!.message)
    }

  fun assertFailureMatches(vararg patterns: String) =
    apply {
      val message = failure!!.message!!
      assertThat(
        patterns.firstOrNull { pattern ->
          message.matches(pattern.toRegex())
        },

    executeSynchronously("/").assertBody("seed connection pool")

    // If this succeeds, too many requests were made.
    executeSynchronously("/")
      .assertFailure(IOException::class.java)
      .assertFailureMatches(
        "stream was reset: CANCEL",
        "unexpected end of stream on " + server.url("/").redact(),
      )
  }

  @RetryingTest(5)
  @Flaky