@Test void forwardedRoute_prometheus() throws Exception {
    assertThat(get("/zipkin/api/v2/services").isSuccessful())
        .isTrue();

    assertThat(scrape())
        .contains("uri=\"/api/v2/services\"")
        .doesNotContain("uri=\"/zipkin/api/v2/services\"");
  }
Only add tests that do not consider the value of a counter or gauge, as these will flake and so
should only exist in {@link ITZipkinMetricsDirty}.
zipkin-server/src/test/java/zipkin2/server/internal/prometheus/ITZipkinMetrics.java