t.Fatalf("expected post-upgrade container image not to include %q, got %q", fromVersion, c.Image)
			}
		}
	}

	// Stop the traffic generator and get the result.
	g.Stop().CheckSuccessRate(t, successThreshold)
}

// enableDefaultInjection takes a namespaces and relabels it such that it will have a default sidecar injected
func enableDefaultInjection(ns namespace.Instance) error {