String getAsString(String path) throws IOException {
    Response response = get(path);
    assertThat(response.isSuccessful())
      .withFailMessage(response.toString())
      .isTrue();
    return response.body().string();
  }
Makes sure the prometheus filter doesn't count twice
zipkin-server/src/test/java/zipkin2/server/internal/prometheus/ITZipkinMetricsDirty.java