hcUp.storeScaleEvent(behaviorUp, tc.key, 10, 10+tc.replicaChange)
			if !assert.Len(t, hcUp.scaleUpEvents[tc.key], len(tc.newScaleEvents), "up: scale events differ in length") {
				return
			}
			for i, gotEvent := range hcUp.scaleUpEvents[tc.key] {
				expEvent := tc.newScaleEvents[i]
				assert.Equal(t, expEvent.replicaChange, gotEvent.replicaChange, "up: idx:%v replicaChange", i)

		markScaleEventsOutdated(a.scaleUpEvents[key], longestPolicyPeriod)
		replicaChange := newReplicas - prevReplicas
		for i, event := range a.scaleUpEvents[key] {
			if event.outdated {
				foundOldSample = true
				oldSampleIndex = i
			}
		}
		newEvent := timestampedScaleEvent{replicaChange, time.Now(), false}
		if foundOldSample {
			a.scaleUpEvents[key][oldSampleIndex] = newEvent