opts.Check = check.And(opts.Check, check.ReachedSourceCluster(t.Clusters()))
											} else {
												opts.Check = check.And(opts.Check, check.ReachedClusters(t.Clusters(), expectedClusters))
											}
										} else {
											// Expect to stay in the same cluster as the source pod.
											expectedClusters := cluster.Clusters{from.Config().Cluster}

      - backend:
          service:
            name: b
            port:
              number: 80
        path: %s
        pathType: Prefix
`

			successChecker := check.And(check.OK(), check.ReachedClusters(t.AllClusters(), apps.B.Clusters()))
			failureChecker := check.Status(http.StatusNotFound)
			count := 2 * t.Clusters().Len()

			// TODO check all clusters were hit
			cases := []struct {
				name       string